31643190336473 has 4 divisors (see below), whose sum is σ = 31644793435920. Its totient is φ = 31641587237028.

The previous prime is 31643190336343. The next prime is 31643190336481. The reversal of 31643190336473 is 37463309134613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31643190336473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31643190333473) 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, 801520115 + ... + 801559592.

It is an arithmetic number, because the mean of its divisors is an integer number (7911198358980).

Almost surely, 2^{31643190336473} is an apocalyptic number.

It is an amenable number.

31643190336473 is a deficient number, since it is larger than the sum of its proper divisors (1603099447).

31643190336473 is a wasteful number, since it uses less digits than its factorization.

31643190336473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603099446.

The product of its (nonzero) digits is 8817984, while the sum is 53.

The spelling of 31643190336473 in words is "thirty-one trillion, six hundred forty-three billion, one hundred ninety million, three hundred thirty-six thousand, four hundred seventy-three".