79877954478 has 32 divisors (see below), whose sum is σ = 182679171840. Its totient is φ = 22809648960.

The previous prime is 79877954459. The next prime is 79877954483. The reversal of 79877954478 is 87445977897.

It is a super-3 number, since 3×79877954478³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 449023 + ... + 601146.

It is an arithmetic number, because the mean of its divisors is an integer number (5708724120).

Almost surely, 2^79877954478 is an apocalyptic number.

79877954478 is an abundant number, since it is smaller than the sum of its proper divisors (102801217362).

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

79877954478 is a wasteful number, since it uses less digits than its factorization.

79877954478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051992.

The product of its digits is 995742720, while the sum is 75.

The spelling of 79877954478 in words is "seventy-nine billion, eight hundred seventy-seven million, nine hundred fifty-four thousand, four hundred seventy-eight".