31577343852 has 12 divisors (see below), whose sum is σ = 73680469016. Its totient is φ = 10525781280.

The previous prime is 31577343851. The next prime is 31577343983. The reversal of 31577343852 is 25834377513.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (31577343851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315722649 + ... + 1315722672.

Almost surely, 2^31577343852 is an apocalyptic number.

It is an amenable number.

31577343852 is an abundant number, since it is smaller than the sum of its proper divisors (42103125164).

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

31577343852 is a wasteful number, since it uses less digits than its factorization.

31577343852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631445328 (or 2631445326 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 48.

The spelling of 31577343852 in words is "thirty-one billion, five hundred seventy-seven million, three hundred forty-three thousand, eight hundred fifty-two".