7957438544 has 40 divisors (see below), whose sum is σ = 16824235680. Its totient is φ = 3615920000.

The previous prime is 7957438543. The next prime is 7957438549. The reversal of 7957438544 is 4458347597.

It is a self number, because there is not a number n which added to its sum of digits gives 7957438544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7957438543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 964067 + ... + 972285.

It is an arithmetic number, because the mean of its divisors is an integer number (420605892).

Almost surely, 2^7957438544 is an apocalyptic number.

It is an amenable number.

7957438544 is an abundant number, since it is smaller than the sum of its proper divisors (8866797136).

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

7957438544 is a wasteful number, since it uses less digits than its factorization.

7957438544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13739 (or 13733 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 56.

The square root of 7957438544 is about 89204.4760311948. The cubic root of 7957438544 is about 1996.4469034906.

The spelling of 7957438544 in words is "seven billion, nine hundred fifty-seven million, four hundred thirty-eight thousand, five hundred forty-four".