1656006505 has 16 divisors (see below), whose sum is σ = 2021431104. Its totient is φ = 1302079680.

The previous prime is 1656006449. The next prime is 1656006529. The reversal of 1656006505 is 5056006561.

It is not a de Polignac number, because 1656006505 - 2⁹ = 1656005993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149074 + ... + 159796.

It is an arithmetic number, because the mean of its divisors is an integer number (126339444).

Almost surely, 2^1656006505 is an apocalyptic number.

It is an amenable number.

1656006505 is a deficient number, since it is larger than the sum of its proper divisors (365424599).

1656006505 is a wasteful number, since it uses less digits than its factorization.

1656006505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11256.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 1656006505 is about 40694.0598245002. The cubic root of 1656006505 is about 1183.0978890608.

The spelling of 1656006505 in words is "one billion, six hundred fifty-six million, six thousand, five hundred five".