71572157292 has 24 divisors (see below), whose sum is σ = 167528528496. Its totient is φ = 23782124608.

The previous prime is 71572157281. The next prime is 71572157309. The reversal of 71572157292 is 29275127517.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9403683 + ... + 9411290.

It is an arithmetic number, because the mean of its divisors is an integer number (6980355354).

Almost surely, 2^71572157292 is an apocalyptic number.

It is an amenable number.

71572157292 is an abundant number, since it is smaller than the sum of its proper divisors (95956371204).

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

71572157292 is a wasteful number, since it uses less digits than its factorization.

71572157292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18815297 (or 18815295 counting only the distinct ones).

The product of its digits is 617400, while the sum is 48.

The spelling of 71572157292 in words is "seventy-one billion, five hundred seventy-two million, one hundred fifty-seven thousand, two hundred ninety-two".