2640086437 has 4 divisors (see below), whose sum is σ = 2701483840. Its totient is φ = 2578689036.

The previous prime is 2640086429. The next prime is 2640086443. The reversal of 2640086437 is 7346800462.

It is a happy number.

2640086437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2640086437 - 2³ = 2640086429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2640086437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640086497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30698637 + ... + 30698722.

It is an arithmetic number, because the mean of its divisors is an integer number (675370960).

Almost surely, 2^2640086437 is an apocalyptic number.

It is an amenable number.

2640086437 is a deficient number, since it is larger than the sum of its proper divisors (61397403).

2640086437 is an equidigital number, since it uses as much as digits as its factorization.

2640086437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61397402.

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 2640086437 is about 51381.7714466911. The cubic root of 2640086437 is about 1382.0997295814.

Adding to 2640086437 its reverse (7346800462), we get a palindrome (9986886899).

The spelling of 2640086437 in words is "two billion, six hundred forty million, eighty-six thousand, four hundred thirty-seven".