1656560001 has 16 divisors (see below), whose sum is σ = 2245726080. Its totient is φ = 1085965440.

The previous prime is 1656559991. The next prime is 1656560047. The reversal of 1656560001 is 1000656561.

It is not a de Polignac number, because 1656560001 - 2⁵ = 1656559969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1656560071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72861 + ... + 92853.

It is an arithmetic number, because the mean of its divisors is an integer number (140357880).

Almost surely, 2^1656560001 is an apocalyptic number.

It is an amenable number.

1656560001 is a deficient number, since it is larger than the sum of its proper divisors (589166079).

1656560001 is a wasteful number, since it uses less digits than its factorization.

1656560001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20456.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1656560001 is about 40700.8599540599. The cubic root of 1656560001 is about 1183.2296854445.

The spelling of 1656560001 in words is "one billion, six hundred fifty-six million, five hundred sixty thousand, one".