78624050728 has 96 divisors (see below), whose sum is σ = 156711096360. Its totient is φ = 36949893120.

The previous prime is 78624050723. The next prime is 78624050741. The reversal of 78624050728 is 82705042687.

It can be written as a sum of positive squares in 4 ways, for example, as 74650261284 + 3973789444 = 273222^2 + 63038^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (78624050723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53087748 + ... + 53089228.

Almost surely, 2^78624050728 is an apocalyptic number.

It is an amenable number.

78624050728 is a deficient number, since it is larger than the sum of its proper divisors (78087045632).

78624050728 is a wasteful number, since it uses less digits than its factorization.

78624050728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707 (or 1660 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 49.

The spelling of 78624050728 in words is "seventy-eight billion, six hundred twenty-four million, fifty thousand, seven hundred twenty-eight".