74691052657 has 16 divisors (see below), whose sum is σ = 80829535248. Its totient is φ = 68609537280.

The previous prime is 74691052619. The next prime is 74691052691. The reversal of 74691052657 is 75625019647.

It can be written as a sum of positive squares in 8 ways, for example, as 87778161 + 74603274496 = 9369^2 + 273136^2 .

It is a cyclic number.

It is not a de Polignac number, because 74691052657 - 2⁷ = 74691052529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74691052757) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2218683 + ... + 2252095.

It is an arithmetic number, because the mean of its divisors is an integer number (5051845953).

Almost surely, 2^74691052657 is an apocalyptic number.

It is an amenable number.

74691052657 is a deficient number, since it is larger than the sum of its proper divisors (6138482591).

74691052657 is a wasteful number, since it uses less digits than its factorization.

74691052657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34260.

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 74691052657 in words is "seventy-four billion, six hundred ninety-one million, fifty-two thousand, six hundred fifty-seven".