31520664553 has 8 divisors (see below), whose sum is σ = 36036274880. Its totient is φ = 27008218800.

The previous prime is 31520664551. The next prime is 31520664557. The reversal of 31520664553 is 35546602513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31520664553 - 2¹ = 31520664551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31520664551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769758 + ... + 809671.

It is an arithmetic number, because the mean of its divisors is an integer number (4504534360).

Almost surely, 2^31520664553 is an apocalyptic number.

It is an amenable number.

31520664553 is a deficient number, since it is larger than the sum of its proper divisors (4515610327).

31520664553 is a wasteful number, since it uses less digits than its factorization.

31520664553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582287.

The product of its (nonzero) digits is 324000, while the sum is 40.

The spelling of 31520664553 in words is "thirty-one billion, five hundred twenty million, six hundred sixty-four thousand, five hundred fifty-three".