977560641 has 6 divisors (see below), whose sum is σ = 1412032050. Its totient is φ = 651707088.

The previous prime is 977560613. The next prime is 977560669. The reversal of 977560641 is 146065779.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (977560613) and next prime (977560669).

It can be written as a sum of positive squares in only one way, i.e., 877640625 + 99920016 = 29625^2 + 9996^2 .

It is not a de Polignac number, because 977560641 - 2¹³ = 977552449 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (977560841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54308916 + ... + 54308933.

It is an arithmetic number, because the mean of its divisors is an integer number (235338675).

Almost surely, 2^977560641 is an apocalyptic number.

It is an amenable number.

977560641 is a deficient number, since it is larger than the sum of its proper divisors (434471409).

977560641 is a wasteful number, since it uses less digits than its factorization.

977560641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108617855 (or 108617852 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 977560641 is about 31265.9661772989. The cubic root of 977560641 is about 992.4635583995.

The spelling of 977560641 in words is "nine hundred seventy-seven million, five hundred sixty thousand, six hundred forty-one".