31940877146 has 4 divisors (see below), whose sum is σ = 47911315722. Its totient is φ = 15970438572.

The previous prime is 31940877097. The next prime is 31940877149. The reversal of 31940877146 is 64177804913.

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., 27088222225 + 4852654921 = 164585^2 + 69661^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31940877094 and 31940877103.

It is not an unprimeable number, because it can be changed into a prime (31940877149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7985219285 + ... + 7985219288.

Almost surely, 2^31940877146 is an apocalyptic number.

31940877146 is a deficient number, since it is larger than the sum of its proper divisors (15970438576).

31940877146 is a wasteful number, since it uses less digits than its factorization.

31940877146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15970438575.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 31940877146 in words is "thirty-one billion, nine hundred forty million, eight hundred seventy-seven thousand, one hundred forty-six".