31964963187 has 18 divisors (see below), whose sum is σ = 43060016748. Its totient is φ = 21092174928.

The previous prime is 31964963171. The next prime is 31964963197. The reversal of 31964963187 is 78136946913.

It is a happy number.

It is not a de Polignac number, because 31964963187 - 2⁴ = 31964963171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31964963197) 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 17 ways as a sum of consecutive naturals, for example, 33753448 + ... + 33754394.

Almost surely, 2^31964963187 is an apocalyptic number.

31964963187 is a deficient number, since it is larger than the sum of its proper divisors (11095053561).

31964963187 is an frugal number, since it uses more digits than its factorization.

31964963187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115 (or 1059 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 57.

The spelling of 31964963187 in words is "thirty-one billion, nine hundred sixty-four million, nine hundred sixty-three thousand, one hundred eighty-seven".