1658610816 has 32 divisors (see below), whose sum is σ = 4405686000. Its totient is φ = 552870144.

The previous prime is 1658610769. The next prime is 1658610823. The reversal of 1658610816 is 6180168561.

It is a tau number, because it is divible by the number of its divisors (32).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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, 2159266 + ... + 2160033.

Almost surely, 2^1658610816 is an apocalyptic number.

1658610816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1658610816 is an abundant number, since it is smaller than the sum of its proper divisors (2747075184).

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

1658610816 is an equidigital number, since it uses as much as digits as its factorization.

1658610816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4319316 (or 4319304 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 1658610816 is about 40726.0459165876. The cubic root of 1658610816 is about 1183.7177620422.

The spelling of 1658610816 in words is "one billion, six hundred fifty-eight million, six hundred ten thousand, eight hundred sixteen".