79895157644 has 24 divisors (see below), whose sum is σ = 145160001840. Its totient is φ = 38430818496.

The previous prime is 79895157623. The next prime is 79895157709. The reversal of 79895157644 is 44675159897.

It is a super-2 number, since 2×79895157644² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1211102 + ... + 1275365.

It is an arithmetic number, because the mean of its divisors is an integer number (6048333410).

Almost surely, 2^79895157644 is an apocalyptic number.

It is an amenable number.

79895157644 is a deficient number, since it is larger than the sum of its proper divisors (65264844196).

79895157644 is a wasteful number, since it uses less digits than its factorization.

79895157644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486777 (or 2486775 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 65.

The spelling of 79895157644 in words is "seventy-nine billion, eight hundred ninety-five million, one hundred fifty-seven thousand, six hundred forty-four".