2640156940 has 24 divisors (see below), whose sum is σ = 5553580032. Its totient is φ = 1054300800.

The previous prime is 2640156931. The next prime is 2640156971. The reversal of 2640156940 is 496510462.

2640156940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2640156940.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97804 + ... + 121843.

It is an arithmetic number, because the mean of its divisors is an integer number (231399168).

Almost surely, 2^2640156940 is an apocalyptic number.

2640156940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2640156940 is an abundant number, since it is smaller than the sum of its proper divisors (2913423092).

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

2640156940 is a wasteful number, since it uses less digits than its factorization.

2640156940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220257 (or 220255 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 2640156940 is about 51382.4575122677. The cubic root of 2640156940 is about 1382.1120323743.

The spelling of 2640156940 in words is "two billion, six hundred forty million, one hundred fifty-six thousand, nine hundred forty".