977207377444 has 9 divisors (see below), whose sum is σ = 1710116370417. Its totient is φ = 488602700184.

The previous prime is 977207377423. The next prime is 977207377507. The reversal of 977207377444 is 444773702779.

The square root of 977207377444 is 988538.

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

It can be written as a sum of positive squares in only one way, i.e., 651349071844 + 325858305600 = 807062^2 + 570840^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1729942 + ... + 2224210.

Almost surely, 2^977207377444 is an apocalyptic number.

977207377444 is the 988538-th square number.

It is an amenable number.

977207377444 is a deficient number, since it is larger than the sum of its proper divisors (732908992973).

977207377444 is an frugal number, since it uses more digits than its factorization.

977207377444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988542 (or 494271 counting only the distinct ones).

The product of its (nonzero) digits is 58084992, while the sum is 61.

The spelling of 977207377444 in words is "nine hundred seventy-seven billion, two hundred seven million, three hundred seventy-seven thousand, four hundred forty-four".