1656001089 has 12 divisors (see below), whose sum is σ = 2425692672. Its totient is φ = 1088451000.

The previous prime is 1656001073. The next prime is 1656001091. The reversal of 1656001089 is 9801006561.

1656001089 is a `hidden beast` number, since 1 + 6 + 560 + 0 + 10 + 89 = 666.

It is not a de Polignac number, because 1656001089 - 2⁴ = 1656001073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1656001019) 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, 1295137 + ... + 1296414.

It is an arithmetic number, because the mean of its divisors is an integer number (202141056).

Almost surely, 2^1656001089 is an apocalyptic number.

It is an amenable number.

1656001089 is a deficient number, since it is larger than the sum of its proper divisors (769691583).

1656001089 is a wasteful number, since it uses less digits than its factorization.

1656001089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591628 (or 2591625 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1656001089 is about 40693.9932791069. The cubic root of 1656001089 is about 1183.0965992782.

The spelling of 1656001089 in words is "one billion, six hundred fifty-six million, one thousand, eighty-nine".