31573031648 has 24 divisors (see below), whose sum is σ = 62335517328. Its totient is φ = 15741789184.

The previous prime is 31573031647. The next prime is 31573031701. The reversal of 31573031648 is 84613037513.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31573031647) by changing a digit.

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, 1386236 + ... + 1408827.

It is an arithmetic number, because the mean of its divisors is an integer number (2597313222).

Almost surely, 2^31573031648 is an apocalyptic number.

It is an amenable number.

31573031648 is a deficient number, since it is larger than the sum of its proper divisors (30762485680).

31573031648 is a wasteful number, since it uses less digits than its factorization.

31573031648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2795426 (or 2795418 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 31573031648 in words is "thirty-one billion, five hundred seventy-three million, thirty-one thousand, six hundred forty-eight".