31896500569813 has 4 divisors (see below), whose sum is σ = 34796182439808. Its totient is φ = 28996818699820.

The previous prime is 31896500569793. The next prime is 31896500569897.

31896500569813 is nontrivially palindromic in base 10.

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 not a de Polignac number, because 31896500569813 - 2¹³ = 31896500561621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31896500569313) 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, 1449840934981 + ... + 1449840935002.

It is an arithmetic number, because the mean of its divisors is an integer number (8699045609952).

Almost surely, 2^{31896500569813} is an apocalyptic number.

It is an amenable number.

31896500569813 is a deficient number, since it is larger than the sum of its proper divisors (2899681869995).

31896500569813 is a wasteful number, since it uses less digits than its factorization.

31896500569813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2899681869994.

The product of its (nonzero) digits is 41990400, while the sum is 64.

The spelling of 31896500569813 in words is "thirty-one trillion, eight hundred ninety-six billion, five hundred million, five hundred sixty-nine thousand, eight hundred thirteen".