79289508520 has 16 divisors (see below), whose sum is σ = 178401394260. Its totient is φ = 31715803392.

The previous prime is 79289508509. The next prime is 79289508583. The reversal of 79289508520 is 2580598297.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75099017764 + 4190490756 = 274042^2 + 64734^2 .

It is a super-2 number, since 2×79289508520² (a number of 23 digits) contains 22 as substring.

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, 991118817 + ... + 991118896.

Almost surely, 2^79289508520 is an apocalyptic number.

It is an amenable number.

79289508520 is an abundant number, since it is smaller than the sum of its proper divisors (99111885740).

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

79289508520 is a wasteful number, since it uses less digits than its factorization.

79289508520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982237724 (or 1982237720 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 55.

The spelling of 79289508520 in words is "seventy-nine billion, two hundred eighty-nine million, five hundred eight thousand, five hundred twenty".