2611240655 has 4 divisors (see below), whose sum is σ = 3133488792. Its totient is φ = 2088992520.

The previous prime is 2611240651. The next prime is 2611240657. The reversal of 2611240655 is 5560421162.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2611240655 - 2² = 2611240651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2611240651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261124061 + ... + 261124070.

It is an arithmetic number, because the mean of its divisors is an integer number (783372198).

Almost surely, 2^2611240655 is an apocalyptic number.

2611240655 is a deficient number, since it is larger than the sum of its proper divisors (522248137).

2611240655 is an equidigital number, since it uses as much as digits as its factorization.

2611240655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522248136.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2611240655 is about 51100.2999501960. The cubic root of 2611240655 is about 1377.0476431409.

The spelling of 2611240655 in words is "two billion, six hundred eleven million, two hundred forty thousand, six hundred fifty-five".