71512997398 has 16 divisors (see below), whose sum is σ = 107632929600. Its totient is φ = 35635461696.

The previous prime is 71512997377. The next prime is 71512997399. The reversal of 71512997398 is 89379921517.

It is a super-2 number, since 2×71512997398² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71512997399) 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, 1365411 + ... + 1416817.

It is an arithmetic number, because the mean of its divisors is an integer number (6727058100).

Almost surely, 2^71512997398 is an apocalyptic number.

71512997398 is a deficient number, since it is larger than the sum of its proper divisors (36119932202).

71512997398 is a wasteful number, since it uses less digits than its factorization.

71512997398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53751.

The product of its digits is 8573040, while the sum is 61.

The spelling of 71512997398 in words is "seventy-one billion, five hundred twelve million, nine hundred ninety-seven thousand, three hundred ninety-eight".