31973803045633 has 4 divisors (see below), whose sum is σ = 32177457842260. Its totient is φ = 31770148249008.

The previous prime is 31973803045621. The next prime is 31973803045643. The reversal of 31973803045633 is 33654030837913.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11946092641344 + 20027710404289 = 3456312^2 + 4475233^2 .

It is a cyclic number.

It is not a de Polignac number, because 31973803045633 - 2¹⁷ = 31973802914561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31973803045643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101827398078 + ... + 101827398391.

It is an arithmetic number, because the mean of its divisors is an integer number (8044364460565).

Almost surely, 2^{31973803045633} is an apocalyptic number.

It is an amenable number.

31973803045633 is a deficient number, since it is larger than the sum of its proper divisors (203654796627).

31973803045633 is a wasteful number, since it uses less digits than its factorization.

31973803045633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203654796626.

The product of its (nonzero) digits is 14696640, while the sum is 55.

The spelling of 31973803045633 in words is "thirty-one trillion, nine hundred seventy-three billion, eight hundred three million, forty-five thousand, six hundred thirty-three".