2640251356 has 6 divisors (see below), whose sum is σ = 4620439880. Its totient is φ = 1320125676.

The previous prime is 2640251347. The next prime is 2640251359. The reversal of 2640251356 is 6531520462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640251359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330031416 + ... + 330031423.

Almost surely, 2^2640251356 is an apocalyptic number.

It is an amenable number.

2640251356 is a deficient number, since it is larger than the sum of its proper divisors (1980188524).

2640251356 is a wasteful number, since it uses less digits than its factorization.

2640251356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660062843 (or 660062841 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 2640251356 is about 51383.3762611995. The cubic root of 2640251356 is about 1382.1285076492.

The spelling of 2640251356 in words is "two billion, six hundred forty million, two hundred fifty-one thousand, three hundred fifty-six".