1659910564 has 27 divisors (see below), whose sum is σ = 3147490017. Its totient is φ = 765623664.

The previous prime is 1659910537. The next prime is 1659910579. The reversal of 1659910564 is 4650199561.

It is a happy number.

The square root of 1659910564 is 40742.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 245548900 + 1414361664 = 15670^2 + 37608^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1058509 + ... + 1060075.

Almost surely, 2^1659910564 is an apocalyptic number.

1659910564 is the 40742-nd square number.

It is an amenable number.

1659910564 is a deficient number, since it is larger than the sum of its proper divisors (1487579453).

1659910564 is an equidigital number, since it uses as much as digits as its factorization.

1659910564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3164 (or 1582 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 46.

The cubic root of 1659910564 is about 1184.0268827975.

Multiplying 1659910564 by its product of nonzero digits (291600), we get a square (484029920462400 = 22000680²).

The spelling of 1659910564 in words is "one billion, six hundred fifty-nine million, nine hundred ten thousand, five hundred sixty-four".