74199491657 has 8 divisors (see below), whose sum is σ = 79045750560. Its totient is φ = 69447335040.

The previous prime is 74199491599. The next prime is 74199491693. The reversal of 74199491657 is 75619499147.

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

It is not a de Polignac number, because 74199491657 - 2⁶ = 74199491593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74199491657.

It is not an unprimeable number, because it can be changed into a prime (74199491057) 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, 23523944 + ... + 23527097.

It is an arithmetic number, because the mean of its divisors is an integer number (9880718820).

Almost surely, 2^74199491657 is an apocalyptic number.

It is an amenable number.

74199491657 is a deficient number, since it is larger than the sum of its proper divisors (4846258903).

74199491657 is a wasteful number, since it uses less digits than its factorization.

74199491657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47051143.

The product of its digits is 17146080, while the sum is 62.

The spelling of 74199491657 in words is "seventy-four billion, one hundred ninety-nine million, four hundred ninety-one thousand, six hundred fifty-seven".