31716406811 has 4 divisors (see below), whose sum is σ = 33385691400. Its totient is φ = 30047122224.

The previous prime is 31716406801. The next prime is 31716406817. The reversal of 31716406811 is 11860461713.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31716406811 - 2⁶ = 31716406747 is a prime.

It is a super-2 number, since 2×31716406811² (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 (31716406817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 834642266 + ... + 834642303.

It is an arithmetic number, because the mean of its divisors is an integer number (8346422850).

Almost surely, 2^31716406811 is an apocalyptic number.

31716406811 is a deficient number, since it is larger than the sum of its proper divisors (1669284589).

31716406811 is a wasteful number, since it uses less digits than its factorization.

31716406811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669284588.

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 31716406811 in words is "thirty-one billion, seven hundred sixteen million, four hundred six thousand, eight hundred eleven".