81569453298 has 16 divisors (see below), whose sum is σ = 163199383200. Its totient is φ = 27179738336.

The previous prime is 81569453281. The next prime is 81569453327. The reversal of 81569453298 is 89235496518.

It is a super-2 number, since 2×81569453298² (a number of 23 digits) contains 22 as substring.

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, 2502315 + ... + 2534702.

It is an arithmetic number, because the mean of its divisors is an integer number (10199961450).

Almost surely, 2^81569453298 is an apocalyptic number.

81569453298 is an abundant number, since it is smaller than the sum of its proper divisors (81629929902).

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

81569453298 is a wasteful number, since it uses less digits than its factorization.

81569453298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5039721.

The product of its digits is 18662400, while the sum is 60.

The spelling of 81569453298 in words is "eighty-one billion, five hundred sixty-nine million, four hundred fifty-three thousand, two hundred ninety-eight".