31379477155 has 48 divisors (see below), whose sum is σ = 41748204960. Its totient is φ = 22502025216.

The previous prime is 31379477071. The next prime is 31379477167. The reversal of 31379477155 is 55177497313.

It is not a de Polignac number, because 31379477155 - 2¹¹ = 31379475107 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30376519 + ... + 30377551.

It is an arithmetic number, because the mean of its divisors is an integer number (869754270).

Almost surely, 2^31379477155 is an apocalyptic number.

31379477155 is a deficient number, since it is larger than the sum of its proper divisors (10368727805).

31379477155 is a wasteful number, since it uses less digits than its factorization.

31379477155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288 (or 1199 counting only the distinct ones).

The product of its digits is 2778300, while the sum is 52.

The spelling of 31379477155 in words is "thirty-one billion, three hundred seventy-nine million, four hundred seventy-seven thousand, one hundred fifty-five".