31650552640 has 112 divisors (see below), whose sum is σ = 90668246400. Its totient is φ = 10280466432.

The previous prime is 31650552551. The next prime is 31650552649. The reversal of 31650552640 is 4625505613.

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 31650552640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31650552649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329275 + ... + 414394.

Almost surely, 2^31650552640 is an apocalyptic number.

It is an amenable number.

31650552640 is an abundant number, since it is smaller than the sum of its proper divisors (59017693760).

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

31650552640 is a wasteful number, since it uses less digits than its factorization.

31650552640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743712 (or 743702 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 31650552640 in words is "thirty-one billion, six hundred fifty million, five hundred fifty-two thousand, six hundred forty".