74507661965 has 16 divisors (see below), whose sum is σ = 103274792640. Its totient is φ = 50999896320.

The previous prime is 74507661959. The next prime is 74507661973. The reversal of 74507661965 is 56916670547.

It is not a de Polignac number, because 74507661965 - 2²⁴ = 74490884749 is a prime.

It is a super-2 number, since 2×74507661965² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74507661965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39842735 + ... + 39844604.

It is an arithmetic number, because the mean of its divisors is an integer number (6454674540).

Almost surely, 2^74507661965 is an apocalyptic number.

It is an amenable number.

74507661965 is a deficient number, since it is larger than the sum of its proper divisors (28767130675).

74507661965 is a wasteful number, since it uses less digits than its factorization.

74507661965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79687372.

The product of its (nonzero) digits is 9525600, while the sum is 56.

The spelling of 74507661965 in words is "seventy-four billion, five hundred seven million, six hundred sixty-one thousand, nine hundred sixty-five".