1656025920 has 84 divisors (see below), whose sum is σ = 5696049060. Its totient is φ = 441606144.

The previous prime is 1656025919. The next prime is 1656025927. The reversal of 1656025920 is 295206561.

1656025920 is a `hidden beast` number, since 1 + 6 + 5 + 60 + 2 + 592 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 397763136 + 1258262784 = 19944^2 + 35472^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656025927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 284625 + ... + 290384.

Almost surely, 2^1656025920 is an apocalyptic number.

1656025920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1656025920 is an abundant number, since it is smaller than the sum of its proper divisors (4040023140).

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

1656025920 is a wasteful number, since it uses less digits than its factorization.

1656025920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575032 (or 575019 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 1656025920 is about 40694.2983721307. The cubic root of 1656025920 is about 1183.1025125845.

The spelling of 1656025920 in words is "one billion, six hundred fifty-six million, twenty-five thousand, nine hundred twenty".