7640539836 has 48 divisors (see below), whose sum is σ = 18115036800. Its totient is φ = 2505919680.

The previous prime is 7640539813. The next prime is 7640539843. The reversal of 7640539836 is 6389350467.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 751515 + ... + 761613.

It is an arithmetic number, because the mean of its divisors is an integer number (377396600).

Almost surely, 2^7640539836 is an apocalyptic number.

It is an amenable number.

7640539836 is an abundant number, since it is smaller than the sum of its proper divisors (10474496964).

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

7640539836 is a wasteful number, since it uses less digits than its factorization.

7640539836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11114 (or 11112 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 51.

The square root of 7640539836 is about 87410.1815351049. The cubic root of 7640539836 is about 1969.5847885099.

The spelling of 7640539836 in words is "seven billion, six hundred forty million, five hundred thirty-nine thousand, eight hundred thirty-six".