1523663664 has 20 divisors (see below), whose sum is σ = 3936131256. Its totient is φ = 507887872.

The previous prime is 1523663639. The next prime is 1523663693. The reversal of 1523663664 is 4663663251.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15871449 + ... + 15871544.

Almost surely, 2^1523663664 is an apocalyptic number.

It is an amenable number.

1523663664 is an abundant number, since it is smaller than the sum of its proper divisors (2412467592).

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

1523663664 is a wasteful number, since it uses less digits than its factorization.

1523663664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31743004 (or 31742998 counting only the distinct ones).

The product of its digits is 466560, while the sum is 42.

The square root of 1523663664 is about 39034.1346003725. The cubic root of 1523663664 is about 1150.7024477153.

The spelling of 1523663664 in words is "one billion, five hundred twenty-three million, six hundred sixty-three thousand, six hundred sixty-four".