77970064554 has 48 divisors (see below), whose sum is σ = 175185583872. Its totient is φ = 25042055904.

The previous prime is 77970064541. The next prime is 77970064567. The reversal of 77970064554 is 45546007977.

It is an interprime number because it is at equal distance from previous prime (77970064541) and next prime (77970064567).

It is a self number, because there is not a number n which added to its sum of digits gives 77970064554.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 499714 + ... + 636909.

It is an arithmetic number, because the mean of its divisors is an integer number (3649699664).

Almost surely, 2^77970064554 is an apocalyptic number.

77970064554 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

77970064554 is an abundant number, since it is smaller than the sum of its proper divisors (97215519318).

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

77970064554 is a wasteful number, since it uses less digits than its factorization.

77970064554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136771 (or 1136768 counting only the distinct ones).

The product of its (nonzero) digits is 7408800, while the sum is 54.

The spelling of 77970064554 in words is "seventy-seven billion, nine hundred seventy million, sixty-four thousand, five hundred fifty-four".