31885408811 has 8 divisors (see below), whose sum is σ = 34398022464. Its totient is φ = 29443573120.

The previous prime is 31885408739. The next prime is 31885408813. The reversal of 31885408811 is 11880458813.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31885408811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31885408813) 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, 17693555 + ... + 17695356.

It is an arithmetic number, because the mean of its divisors is an integer number (4299752808).

Almost surely, 2^31885408811 is an apocalyptic number.

31885408811 is a deficient number, since it is larger than the sum of its proper divisors (2512613653).

31885408811 is a wasteful number, since it uses less digits than its factorization.

31885408811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35388981.

The product of its (nonzero) digits is 245760, while the sum is 47.

The spelling of 31885408811 in words is "thirty-one billion, eight hundred eighty-five million, four hundred eight thousand, eight hundred eleven".