74768873891 has 16 divisors (see below), whose sum is σ = 80815238400. Its totient is φ = 68956943328.

The previous prime is 74768873821. The next prime is 74768873897. The reversal of 74768873891 is 19837886747.

It is a cyclic number.

It is not a de Polignac number, because 74768873891 - 2¹⁸ = 74768611747 is a prime.

It is a super-2 number, since 2×74768873891² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74768873897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208316 + ... + 439241.

It is an arithmetic number, because the mean of its divisors is an integer number (5050952400).

Almost surely, 2^74768873891 is an apocalyptic number.

74768873891 is a deficient number, since it is larger than the sum of its proper divisors (6046364509).

74768873891 is a wasteful number, since it uses less digits than its factorization.

74768873891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647738.

The product of its digits is 113799168, while the sum is 68.

The spelling of 74768873891 in words is "seventy-four billion, seven hundred sixty-eight million, eight hundred seventy-three thousand, eight hundred ninety-one".