31605402401 has 8 divisors (see below), whose sum is σ = 32079350784. Its totient is φ = 31134667680.

The previous prime is 31605402397. The next prime is 31605402403. The reversal of 31605402401 is 10420450613.

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 31605402401 - 2² = 31605402397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31605402403) 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, 783596 + ... + 822941.

It is an arithmetic number, because the mean of its divisors is an integer number (4009918848).

Almost surely, 2^31605402401 is an apocalyptic number.

It is an amenable number.

31605402401 is a deficient number, since it is larger than the sum of its proper divisors (473948383).

31605402401 is a wasteful number, since it uses less digits than its factorization.

31605402401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606831.

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 31605402401 in words is "thirty-one billion, six hundred five million, four hundred two thousand, four hundred one".