74731703641 has 21 divisors (see below), whose sum is σ = 87296412799. Its totient is φ = 63975374904.

The previous prime is 74731703603. The next prime is 74731703677. The reversal of 74731703641 is 14630713747.

The square root of 74731703641 is 273371.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 36238833225 + 38492870416 = 190365^2 + 196196^2 .

It is not a de Polignac number, because 74731703641 - 2¹³ = 74731695449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74731703041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 93765855 + ... + 93766651.

Almost surely, 2^74731703641 is an apocalyptic number.

74731703641 is the 273371-st square number.

74731703641 is the 136686-th centered octagonal number.

It is an amenable number.

74731703641 is a deficient number, since it is larger than the sum of its proper divisors (12564709158).

74731703641 is an frugal number, since it uses more digits than its factorization.

74731703641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636 (or 804 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 43.

The spelling of 74731703641 in words is "seventy-four billion, seven hundred thirty-one million, seven hundred three thousand, six hundred forty-one".