78632553536 has 56 divisors (see below), whose sum is σ = 157322276160. Its totient is φ = 38992891392.

The previous prime is 78632553533. The next prime is 78632553547. The reversal of 78632553536 is 63535523687.

It is a happy number.

It is a super-2 number, since 2×78632553536² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78632553533) 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, 9719285 + ... + 9727371.

It is an arithmetic number, because the mean of its divisors is an integer number (2809326360).

Almost surely, 2^78632553536 is an apocalyptic number.

It is an amenable number.

78632553536 is an abundant number, since it is smaller than the sum of its proper divisors (78689722624).

78632553536 is a wasteful number, since it uses less digits than its factorization.

78632553536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9331 (or 9321 counting only the distinct ones).

The product of its digits is 13608000, while the sum is 53.

The spelling of 78632553536 in words is "seventy-eight billion, six hundred thirty-two million, five hundred fifty-three thousand, five hundred thirty-six".