73643031761 has 16 divisors (see below), whose sum is σ = 81483628800. Its totient is φ = 66137015808.

The previous prime is 73643031727. The next prime is 73643031797. The reversal of 73643031761 is 16713034637.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73643031761 is a prime.

It is a super-2 number, since 2×73643031761² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73643031661) 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, 420521 + ... + 569318.

It is an arithmetic number, because the mean of its divisors is an integer number (5092726800).

Almost surely, 2^73643031761 is an apocalyptic number.

It is an amenable number.

73643031761 is a deficient number, since it is larger than the sum of its proper divisors (7840597039).

73643031761 is a wasteful number, since it uses less digits than its factorization.

73643031761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990008.

The product of its (nonzero) digits is 190512, while the sum is 41.

The spelling of 73643031761 in words is "seventy-three billion, six hundred forty-three million, thirty-one thousand, seven hundred sixty-one".