1656000505 has 4 divisors (see below), whose sum is σ = 1987200612. Its totient is φ = 1324800400.

The previous prime is 1656000487. The next prime is 1656000539. The reversal of 1656000505 is 5050006561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1109422864 + 546577641 = 33308^2 + 23379^2 .

It is not a de Polignac number, because 1656000505 - 2⁵ = 1656000473 is a prime.

It is a Duffinian number.

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, 165600046 + ... + 165600055.

It is an arithmetic number, because the mean of its divisors is an integer number (496800153).

Almost surely, 2^1656000505 is an apocalyptic number.

It is an amenable number.

1656000505 is a deficient number, since it is larger than the sum of its proper divisors (331200107).

1656000505 is an equidigital number, since it uses as much as digits as its factorization.

1656000505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331200106.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 1656000505 is about 40693.9861036001. The cubic root of 1656000505 is about 1183.0964602025.

The spelling of 1656000505 in words is "one billion, six hundred fifty-six million, five hundred five", and thus it is an aban number.