656480051 has 4 divisors (see below), whose sum is σ = 656580600. Its totient is φ = 656379504.

The previous prime is 656479981. The next prime is 656480081. The reversal of 656480051 is 150084656.

It is a happy number.

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 656480051 - 2¹⁰ = 656479027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 656479993 and 656480020.

It is not an unprimeable number, because it can be changed into a prime (656480081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39746 + ... + 53783.

It is an arithmetic number, because the mean of its divisors is an integer number (164145150).

Almost surely, 2^656480051 is an apocalyptic number.

656480051 is a deficient number, since it is larger than the sum of its proper divisors (100549).

656480051 is an equidigital number, since it uses as much as digits as its factorization.

656480051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100548.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 656480051 is about 25621.8666572129. The cubic root of 656480051 is about 869.1081939178.

The spelling of 656480051 in words is "six hundred fifty-six million, four hundred eighty thousand, fifty-one".