31328766863 has 4 divisors (see below), whose sum is σ = 33171635520. Its totient is φ = 29485898208.

The previous prime is 31328766857. The next prime is 31328766893. The reversal of 31328766863 is 36866782313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36866782313 = 401 ⋅91937113.

It is a cyclic number.

It is not a de Polignac number, because 31328766863 - 2¹² = 31328762767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31328766823) 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, 921434303 + ... + 921434336.

It is an arithmetic number, because the mean of its divisors is an integer number (8292908880).

Almost surely, 2^31328766863 is an apocalyptic number.

31328766863 is a deficient number, since it is larger than the sum of its proper divisors (1842868657).

31328766863 is a wasteful number, since it uses less digits than its factorization.

31328766863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842868656.

The product of its digits is 5225472, while the sum is 53.

The spelling of 31328766863 in words is "thirty-one billion, three hundred twenty-eight million, seven hundred sixty-six thousand, eight hundred sixty-three".