31572447648 has 48 divisors (see below), whose sum is σ = 94717344960. Its totient is φ = 9020699136.

The previous prime is 31572447623. The next prime is 31572447653. The reversal of 31572447648 is 84674427513.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 31572447648.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23490733 + ... + 23492076.

It is an arithmetic number, because the mean of its divisors is an integer number (1973278020).

Almost surely, 2^31572447648 is an apocalyptic number.

It is an amenable number.

31572447648 is an abundant number, since it is smaller than the sum of its proper divisors (63144897312).

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

31572447648 is a wasteful number, since it uses less digits than its factorization.

31572447648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46982829 (or 46982821 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 51.

The spelling of 31572447648 in words is "thirty-one billion, five hundred seventy-two million, four hundred forty-seven thousand, six hundred forty-eight".