915197778132 has 96 divisors (see below), whose sum is σ = 2445501542400. Its totient is φ = 263837452800.

The previous prime is 915197778041. The next prime is 915197778133. The reversal of 915197778132 is 231877791519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (915197778133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1653957 + ... + 2136812.

It is an arithmetic number, because the mean of its divisors is an integer number (25473974400).

Almost surely, 2^915197778132 is an apocalyptic number.

It is an amenable number.

915197778132 is an abundant number, since it is smaller than the sum of its proper divisors (1530303764268).

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

915197778132 is a wasteful number, since it uses less digits than its factorization.

915197778132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3790877 (or 3790875 counting only the distinct ones).

The product of its digits is 6667920, while the sum is 60.

The spelling of 915197778132 in words is "nine hundred fifteen billion, one hundred ninety-seven million, seven hundred seventy-eight thousand, one hundred thirty-two".