78632520228 has 24 divisors (see below), whose sum is σ = 203862089760. Its totient is φ = 26210840040.

The previous prime is 78632520181. The next prime is 78632520229. The reversal of 78632520228 is 82202523687.

It is a happy number.

78632520228 is a `hidden beast` number, since 7 + 8 + 632 + 5 + 2 + 0 + 2 + 2 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (78632520229) 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, 364039338 + ... + 364039553.

It is an arithmetic number, because the mean of its divisors is an integer number (8494253740).

Almost surely, 2^78632520228 is an apocalyptic number.

It is an amenable number.

78632520228 is an abundant number, since it is smaller than the sum of its proper divisors (125229569532).

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

78632520228 is a wasteful number, since it uses less digits than its factorization.

78632520228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728078904 (or 728078896 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 78632520228 in words is "seventy-eight billion, six hundred thirty-two million, five hundred twenty thousand, two hundred twenty-eight".