9139257688 has 32 divisors (see below), whose sum is σ = 18724248000. Its totient is φ = 4147472160.

The previous prime is 9139257679. The next prime is 9139257689. The reversal of 9139257688 is 8867529319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9139257689) 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, 29418 + ... + 138361.

It is an arithmetic number, because the mean of its divisors is an integer number (585132750).

Almost surely, 2^9139257688 is an apocalyptic number.

It is an amenable number.

9139257688 is an abundant number, since it is smaller than the sum of its proper divisors (9584990312).

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

9139257688 is a wasteful number, since it uses less digits than its factorization.

9139257688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168415 (or 168411 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 58.

The square root of 9139257688 is about 95599.4648938999. The cubic root of 9139257688 is about 2090.7573919116.

The spelling of 9139257688 in words is "nine billion, one hundred thirty-nine million, two hundred fifty-seven thousand, six hundred eighty-eight".