7565688138 has 16 divisors (see below), whose sum is σ = 15144312096. Its totient is φ = 2519740080.

The previous prime is 7565688133. The next prime is 7565688157. The reversal of 7565688138 is 8318865657.

It is not an unprimeable number, because it can be changed into a prime (7565688133) 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, 531381 + ... + 545432.

It is an arithmetic number, because the mean of its divisors is an integer number (946519506).

Almost surely, 2^7565688138 is an apocalyptic number.

7565688138 is an abundant number, since it is smaller than the sum of its proper divisors (7578623958).

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

7565688138 is a wasteful number, since it uses less digits than its factorization.

7565688138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077989.

The product of its digits is 9676800, while the sum is 57.

The square root of 7565688138 is about 86980.9642278125. The cubic root of 7565688138 is about 1963.1318922528.

The spelling of 7565688138 in words is "seven billion, five hundred sixty-five million, six hundred eighty-eight thousand, one hundred thirty-eight".