79475486640 has 160 divisors (see below), whose sum is σ = 268899789312. Its totient is φ = 19257600000.

The previous prime is 79475486533. The next prime is 79475486641. The reversal of 79475486640 is 4668457497.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (79475486641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6728740 + ... + 6740540.

Almost surely, 2^79475486640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79475486640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134449894656).

79475486640 is an abundant number, since it is smaller than the sum of its proper divisors (189424302672).

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

79475486640 is a wasteful number, since it uses less digits than its factorization.

79475486640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14379 (or 14373 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 60.

The spelling of 79475486640 in words is "seventy-nine billion, four hundred seventy-five million, four hundred eighty-six thousand, six hundred forty".