74457086781 has 16 divisors (see below), whose sum is σ = 123772819968. Its totient is φ = 38679006000.

The previous prime is 74457086713. The next prime is 74457086797. The reversal of 74457086781 is 18768075447.

It is not a de Polignac number, because 74457086781 - 2⁹ = 74457086269 is a prime.

It is a super-2 number, since 2×74457086781² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74457086281) 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, 161162295 + ... + 161162756.

It is an arithmetic number, because the mean of its divisors is an integer number (7735801248).

Almost surely, 2^74457086781 is an apocalyptic number.

It is an amenable number.

74457086781 is a deficient number, since it is larger than the sum of its proper divisors (49315733187).

74457086781 is a wasteful number, since it uses less digits than its factorization.

74457086781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322325072.

The product of its (nonzero) digits is 10536960, while the sum is 57.

The spelling of 74457086781 in words is "seventy-four billion, four hundred fifty-seven million, eighty-six thousand, seven hundred eighty-one".