78977442592554 has 64 divisors (see below), whose sum is σ = 176471497635840. Its totient is φ = 23361861320000.

The previous prime is 78977442592547. The next prime is 78977442592567. The reversal of 78977442592554 is 45529524477987.

It is a self number, because there is not a number n which added to its sum of digits gives 78977442592554.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82961934 + ... + 83908505.

It is an arithmetic number, because the mean of its divisors is an integer number (2757367150560).

Almost surely, 2^{78977442592554} is an apocalyptic number.

78977442592554 is an abundant number, since it is smaller than the sum of its proper divisors (97494055043286).

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

78977442592554 is a wasteful number, since it uses less digits than its factorization.

78977442592554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166870627.

The product of its digits is 7112448000, while the sum is 78.

The spelling of 78977442592554 in words is "seventy-eight trillion, nine hundred seventy-seven billion, four hundred forty-two million, five hundred ninety-two thousand, five hundred fifty-four".