31859804945 has 8 divisors (see below), whose sum is σ = 38271888936. Its totient is φ = 25461095296.

The previous prime is 31859804939. The next prime is 31859804947. The reversal of 31859804945 is 54940895813.

It can be written as a sum of positive squares in 4 ways, for example, as 410881 + 31859394064 = 641^2 + 178492^2 .

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 31859804945 - 2⁸ = 31859804689 is a prime.

It is a super-2 number, since 2×31859804945² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31859804947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3338342 + ... + 3347871.

It is an arithmetic number, because the mean of its divisors is an integer number (4783986117).

Almost surely, 2^31859804945 is an apocalyptic number.

It is an amenable number.

31859804945 is a deficient number, since it is larger than the sum of its proper divisors (6412083991).

31859804945 is an equidigital number, since it uses as much as digits as its factorization.

31859804945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6687171.

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 31859804945 in words is "thirty-one billion, eight hundred fifty-nine million, eight hundred four thousand, nine hundred forty-five".