74684561 has 8 divisors (see below), whose sum is σ = 85968960. Its totient is φ = 63553968.

The previous prime is 74684539. The next prime is 74684567. The reversal of 74684561 is 16548647.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74684561 - 2¹⁰ = 74683537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74684567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37406 + ... + 39351.

It is an arithmetic number, because the mean of its divisors is an integer number (10746120).

Almost surely, 2^74684561 is an apocalyptic number.

It is an amenable number.

74684561 is a deficient number, since it is larger than the sum of its proper divisors (11284399).

74684561 is a wasteful number, since it uses less digits than its factorization.

74684561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76903.

The product of its digits is 161280, while the sum is 41.

The square root of 74684561 is about 8642.0229691896. The cubic root of 74684561 is about 421.1242761581.

The spelling of 74684561 in words is "seventy-four million, six hundred eighty-four thousand, five hundred sixty-one".