74579039491 has 32 divisors (see below), whose sum is σ = 86500224000. Its totient is φ = 63548359680.

The previous prime is 74579039443. The next prime is 74579039501. The reversal of 74579039491 is 19493097547.

It is a cyclic number.

It is not a de Polignac number, because 74579039491 - 2¹⁷ = 74578908419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74579039441) 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, 90618106 + ... + 90618928.

It is an arithmetic number, because the mean of its divisors is an integer number (2703132000).

Almost surely, 2^74579039491 is an apocalyptic number.

74579039491 is a deficient number, since it is larger than the sum of its proper divisors (11921184509).

74579039491 is a wasteful number, since it uses less digits than its factorization.

74579039491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2259.

The product of its (nonzero) digits is 8573040, while the sum is 58.

The spelling of 74579039491 in words is "seventy-four billion, five hundred seventy-nine million, thirty-nine thousand, four hundred ninety-one".