31377216805 has 16 divisors (see below), whose sum is σ = 41439138624. Its totient is φ = 22617844480.

The previous prime is 31377216769. The next prime is 31377216859. The reversal of 31377216805 is 50861277313.

It is not a de Polignac number, because 31377216805 - 2¹³ = 31377208613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2518099 + ... + 2530528.

It is an arithmetic number, because the mean of its divisors is an integer number (2589946164).

Almost surely, 2^31377216805 is an apocalyptic number.

It is an amenable number.

31377216805 is a deficient number, since it is larger than the sum of its proper divisors (10061921819).

31377216805 is a wasteful number, since it uses less digits than its factorization.

31377216805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5048756.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 31377216805 in words is "thirty-one billion, three hundred seventy-seven million, two hundred sixteen thousand, eight hundred five".