79548782646 has 32 divisors (see below), whose sum is σ = 167624605440. Its totient is φ = 25097645664.

The previous prime is 79548782641. The next prime is 79548782647. The reversal of 79548782646 is 64628784597.

It is a happy number.

It is a super-2 number, since 2×79548782646² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79548782641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194610 + ... + 443813.

It is an arithmetic number, because the mean of its divisors is an integer number (5238268920).

Almost surely, 2^79548782646 is an apocalyptic number.

79548782646 is an abundant number, since it is smaller than the sum of its proper divisors (88075822794).

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

79548782646 is a wasteful number, since it uses less digits than its factorization.

79548782646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639540.

The product of its digits is 162570240, while the sum is 66.

The spelling of 79548782646 in words is "seventy-nine billion, five hundred forty-eight million, seven hundred eighty-two thousand, six hundred forty-six".