977748645 has 24 divisors (see below), whose sum is σ = 1651077216. Its totient is φ = 494017632.

The previous prime is 977748637. The next prime is 977748647. The reversal of 977748645 is 546847779.

It is not a de Polignac number, because 977748645 - 2³ = 977748637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977748647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84867 + ... + 95696.

It is an arithmetic number, because the mean of its divisors is an integer number (68794884).

Almost surely, 2^977748645 is an apocalyptic number.

977748645 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

977748645 is a deficient number, since it is larger than the sum of its proper divisors (673328571).

977748645 is a wasteful number, since it uses less digits than its factorization.

977748645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180609 (or 180590 counting only the distinct ones).

The product of its digits is 11854080, while the sum is 57.

The square root of 977748645 is about 31268.9725606711. The cubic root of 977748645 is about 992.5271776953.

The spelling of 977748645 in words is "nine hundred seventy-seven million, seven hundred forty-eight thousand, six hundred forty-five".