74877561 has 32 divisors (see below), whose sum is σ = 123027840. Its totient is φ = 44625600.

The previous prime is 74877553. The next prime is 74877563. The reversal of 74877561 is 16577847.

74877561 is a `hidden beast` number, since 7 + 4 + 87 + 7 + 561 = 666.

It is not a de Polignac number, because 74877561 - 2³ = 74877553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74877563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16051 + ... + 20183.

It is an arithmetic number, because the mean of its divisors is an integer number (3844620).

Almost surely, 2^74877561 is an apocalyptic number.

It is an amenable number.

74877561 is a deficient number, since it is larger than the sum of its proper divisors (48150279).

74877561 is a wasteful number, since it uses less digits than its factorization.

74877561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4214 (or 4208 counting only the distinct ones).

The product of its digits is 329280, while the sum is 45.

The square root of 74877561 is about 8653.1821314474. The cubic root of 74877561 is about 421.4867208744.

The spelling of 74877561 in words is "seventy-four million, eight hundred seventy-seven thousand, five hundred sixty-one".