74993756979 has 12 divisors (see below), whose sum is σ = 105531382536. Its totient is φ = 47364477408.

The previous prime is 74993756917. The next prime is 74993757001. The reversal of 74993756979 is 97965739947.

It is a de Polignac number, because none of the positive numbers 2^k-74993756979 is a prime.

It is a super-2 number, since 2×74993756979² (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 74993756979.

It is not an unprimeable number, because it can be changed into a prime (74993756479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34622074 + ... + 34624239.

It is an arithmetic number, because the mean of its divisors is an integer number (8794281878).

Almost surely, 2^74993756979 is an apocalyptic number.

74993756979 is a deficient number, since it is larger than the sum of its proper divisors (30537625557).

74993756979 is a wasteful number, since it uses less digits than its factorization.

74993756979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69246354 (or 69246335 counting only the distinct ones).

The product of its digits is 810152280, while the sum is 75.

The spelling of 74993756979 in words is "seventy-four billion, nine hundred ninety-three million, seven hundred fifty-six thousand, nine hundred seventy-nine".