31656068401 has 4 divisors (see below), whose sum is σ = 32175020404. Its totient is φ = 31137116400.

The previous prime is 31656068393. The next prime is 31656068497. The reversal of 31656068401 is 10486065613.

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 1994962225 + 29661106176 = 44665^2 + 172224^2 .

It is a cyclic number.

It is not a de Polignac number, because 31656068401 - 2³ = 31656068393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31656068201) 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 3 ways as a sum of consecutive naturals, for example, 259475910 + ... + 259476031.

It is an arithmetic number, because the mean of its divisors is an integer number (8043755101).

Almost surely, 2^31656068401 is an apocalyptic number.

It is an amenable number.

31656068401 is a deficient number, since it is larger than the sum of its proper divisors (518952003).

31656068401 is an equidigital number, since it uses as much as digits as its factorization.

31656068401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518952002.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 31656068401 in words is "thirty-one billion, six hundred fifty-six million, sixty-eight thousand, four hundred one".