977155974144 has 297 divisors, whose sum is σ = 3284405221851. Its totient is φ = 278997626880.

The previous prime is 977155974103. The next prime is 977155974161. The reversal of 977155974144 is 441479551779.

It is a happy number.

The square root of 977155974144 is 988512.

It is a perfect power (a square), and thus also a powerful number.

977155974144 is a `hidden beast` number, since 9 + 7 + 7 + 1 + 559 + 74 + 1 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 664279329 + ... + 664280799.

Almost surely, 2^977155974144 is an apocalyptic number.

977155974144 is the 988512-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 977155974144

977155974144 is an abundant number, since it is smaller than the sum of its proper divisors (2307249247707).

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

977155974144 is an equidigital number, since it uses as much as digits as its factorization.

977155974144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2982 (or 1483 counting only the distinct ones).

The product of its digits is 44452800, while the sum is 63.

It can be divided in two parts, 9771559 and 74144, that added together give a triangular number (9845703 = T₄₄₃₇).

The spelling of 977155974144 in words is "nine hundred seventy-seven billion, one hundred fifty-five million, nine hundred seventy-four thousand, one hundred forty-four".