31857378883 has 12 divisors (see below), whose sum is σ = 35053128880. Its totient is φ = 28931197680.

The previous prime is 31857378877. The next prime is 31857378901. The reversal of 31857378883 is 38887375813.

It is not a de Polignac number, because 31857378883 - 2¹³ = 31857370691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31857378863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19128 + ... + 253141.

Almost surely, 2^31857378883 is an apocalyptic number.

31857378883 is a deficient number, since it is larger than the sum of its proper divisors (3195749997).

31857378883 is a wasteful number, since it uses less digits than its factorization.

31857378883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273258 (or 273247 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 61.

The spelling of 31857378883 in words is "thirty-one billion, eight hundred fifty-seven million, three hundred seventy-eight thousand, eight hundred eighty-three".