2031387664 has 20 divisors (see below), whose sum is σ = 4167332604. Its totient is φ = 955947008.

The previous prime is 2031387629. The next prime is 2031387691. The reversal of 2031387664 is 4667831302.

It can be written as a sum of positive squares in 2 ways, for example, as 1543861264 + 487526400 = 39292^2 + 22080^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3733897 + ... + 3734440.

Almost surely, 2^2031387664 is an apocalyptic number.

It is an amenable number.

2031387664 is an abundant number, since it is smaller than the sum of its proper divisors (2135944940).

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

2031387664 is a wasteful number, since it uses less digits than its factorization.

2031387664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7468362 (or 7468356 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 2031387664 is about 45070.9181623805. The cubic root of 2031387664 is about 1266.4778645035.

The spelling of 2031387664 in words is "two billion, thirty-one million, three hundred eighty-seven thousand, six hundred sixty-four".