31383686811 has 16 divisors (see below), whose sum is σ = 42391645184. Its totient is φ = 20650270464.

The previous prime is 31383686801. The next prime is 31383686837. The reversal of 31383686811 is 11868638313.

It is not a de Polignac number, because 31383686811 - 2³¹ = 29236203163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31383686801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40135 + ... + 253728.

It is an arithmetic number, because the mean of its divisors is an integer number (2649477824).

Almost surely, 2^31383686811 is an apocalyptic number.

31383686811 is a deficient number, since it is larger than the sum of its proper divisors (11007958373).

31383686811 is a wasteful number, since it uses less digits than its factorization.

31383686811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294330.

The product of its digits is 497664, while the sum is 48.

The spelling of 31383686811 in words is "thirty-one billion, three hundred eighty-three million, six hundred eighty-six thousand, eight hundred eleven".