8645697138 has 16 divisors (see below), whose sum is σ = 18621501696. Its totient is φ = 2660214480.

The previous prime is 8645697113. The next prime is 8645697139. The reversal of 8645697138 is 8317965468.

It is not an unprimeable number, because it can be changed into a prime (8645697139) 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, 55421058 + ... + 55421213.

It is an arithmetic number, because the mean of its divisors is an integer number (1163843856).

Almost surely, 2^8645697138 is an apocalyptic number.

8645697138 is an abundant number, since it is smaller than the sum of its proper divisors (9975804558).

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

8645697138 is a wasteful number, since it uses less digits than its factorization.

8645697138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110842289.

The product of its digits is 8709120, while the sum is 57.

The square root of 8645697138 is about 92982.2409818133. The cubic root of 8645697138 is about 2052.4220539969.

The spelling of 8645697138 in words is "eight billion, six hundred forty-five million, six hundred ninety-seven thousand, one hundred thirty-eight".