78571695552 has 56 divisors (see below), whose sum is σ = 237585845376. Its totient is φ = 22449055488.

The previous prime is 78571695551. The next prime is 78571695557. The reversal of 78571695552 is 25559617587.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×78571695552² (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 (78571695551) 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, 29229198 + ... + 29231885.

Almost surely, 2^78571695552 is an apocalyptic number.

It is an amenable number.

78571695552 is an abundant number, since it is smaller than the sum of its proper divisors (159014149824).

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

78571695552 is a wasteful number, since it uses less digits than its factorization.

78571695552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58461105 (or 58461095 counting only the distinct ones).

The product of its digits is 26460000, while the sum is 60.

The spelling of 78571695552 in words is "seventy-eight billion, five hundred seventy-one million, six hundred ninety-five thousand, five hundred fifty-two".