31389938746 has 4 divisors (see below), whose sum is σ = 47084908122. Its totient is φ = 15694969372.

The previous prime is 31389938737. The next prime is 31389938759. The reversal of 31389938746 is 64783998313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 29742796521 + 1647142225 = 172461^2 + 40585^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7847484685 + ... + 7847484688.

Almost surely, 2^31389938746 is an apocalyptic number.

31389938746 is a deficient number, since it is larger than the sum of its proper divisors (15694969376).

31389938746 is a wasteful number, since it uses less digits than its factorization.

31389938746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15694969375.

The product of its digits is 23514624, while the sum is 61.

The spelling of 31389938746 in words is "thirty-one billion, three hundred eighty-nine million, nine hundred thirty-eight thousand, seven hundred forty-six".