1656061051 has 4 divisors (see below), whose sum is σ = 1659122704. Its totient is φ = 1652999400.

The previous prime is 1656061031. The next prime is 1656061063. The reversal of 1656061051 is 1501606561.

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

It is a cyclic number.

It is not a de Polignac number, because 1656061051 - 2²⁵ = 1622506619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1656061031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1530015 + ... + 1531096.

It is an arithmetic number, because the mean of its divisors is an integer number (414780676).

Almost surely, 2^1656061051 is an apocalyptic number.

1656061051 is a deficient number, since it is larger than the sum of its proper divisors (3061653).

1656061051 is an equidigital number, since it uses as much as digits as its factorization.

1656061051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3061652.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1656061051 is about 40694.7300150769. The cubic root of 1656061051 is about 1183.1108786533.

The spelling of 1656061051 in words is "one billion, six hundred fifty-six million, sixty-one thousand, fifty-one".