2640451156 has 12 divisors (see below), whose sum is σ = 5280902368. Its totient is φ = 1131621912.

The previous prime is 2640451141. The next prime is 2640451159. The reversal of 2640451156 is 6511540462.

2640451156 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640451159) 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, 47150886 + ... + 47150941.

Almost surely, 2^2640451156 is an apocalyptic number.

It is an amenable number.

2640451156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2640451156 is a wasteful number, since it uses less digits than its factorization.

2640451156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94301838 (or 94301836 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 2640451156 is about 51385.3204329797. The cubic root of 2640451156 is about 1382.1633707831.

The spelling of 2640451156 in words is "two billion, six hundred forty million, four hundred fifty-one thousand, one hundred fifty-six".