74894552781 has 32 divisors (see below), whose sum is σ = 103297420800. Its totient is φ = 48239854080.

The previous prime is 74894552771. The next prime is 74894552857. The reversal of 74894552781 is 18725549847.

It is not a de Polignac number, because 74894552781 - 2⁷ = 74894552653 is a prime.

It is a super-2 number, since 2×74894552781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74894552771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8290375 + ... + 8299403.

It is an arithmetic number, because the mean of its divisors is an integer number (3228044400).

Almost surely, 2^74894552781 is an apocalyptic number.

It is an amenable number.

74894552781 is a deficient number, since it is larger than the sum of its proper divisors (28402868019).

74894552781 is a wasteful number, since it uses less digits than its factorization.

74894552781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9829.

The product of its digits is 22579200, while the sum is 60.

The spelling of 74894552781 in words is "seventy-four billion, eight hundred ninety-four million, five hundred fifty-two thousand, seven hundred eighty-one".