78297223522 has 16 divisors (see below), whose sum is σ = 134339251392. Its totient is φ = 33527093040.

The previous prime is 78297223513. The next prime is 78297223573. The reversal of 78297223522 is 22532279287.

It is a super-2 number, since 2×78297223522² (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, 2388129 + ... + 2420692.

It is an arithmetic number, because the mean of its divisors is an integer number (8396203212).

Almost surely, 2^78297223522 is an apocalyptic number.

78297223522 is a deficient number, since it is larger than the sum of its proper divisors (56042027870).

78297223522 is a wasteful number, since it uses less digits than its factorization.

78297223522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4809993.

The product of its digits is 1693440, while the sum is 49.

The spelling of 78297223522 in words is "seventy-eight billion, two hundred ninety-seven million, two hundred twenty-three thousand, five hundred twenty-two".