78332550028 has 12 divisors (see below), whose sum is σ = 137187176560. Its totient is φ = 39136213872.

The previous prime is 78332550017. The next prime is 78332550059. The reversal of 78332550028 is 82005523387.

It is a super-2 number, since 2×78332550028² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7509423 + ... + 7519846.

Almost surely, 2^78332550028 is an apocalyptic number.

It is an amenable number.

78332550028 is a deficient number, since it is larger than the sum of its proper divisors (58854626532).

78332550028 is a wasteful number, since it uses less digits than its factorization.

78332550028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15030576 (or 15030574 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 78332550028 in words is "seventy-eight billion, three hundred thirty-two million, five hundred fifty thousand, twenty-eight".