31490749632 has 28 divisors (see below), whose sum is σ = 83319275576. Its totient is φ = 10496916480.

The previous prime is 31490749613. The next prime is 31490749643. The reversal of 31490749632 is 23694709413.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

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 3 ways as a sum of consecutive naturals, for example, 82006969 + ... + 82007352.

Almost surely, 2^31490749632 is an apocalyptic number.

31490749632 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31490749632 is an abundant number, since it is smaller than the sum of its proper divisors (51828525944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31490749632 is a wasteful number, since it uses less digits than its factorization.

31490749632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164014336 (or 164014326 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 48.

The spelling of 31490749632 in words is "thirty-one billion, four hundred ninety million, seven hundred forty-nine thousand, six hundred thirty-two".