2656465251 has 8 divisors (see below), whose sum is σ = 3863949504. Its totient is φ = 1609978920.

The previous prime is 2656465243. The next prime is 2656465261. The reversal of 2656465251 is 1525646562.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2656465251 - 2³ = 2656465243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2656465211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40249441 + ... + 40249506.

It is an arithmetic number, because the mean of its divisors is an integer number (482993688).

Almost surely, 2^2656465251 is an apocalyptic number.

2656465251 is a deficient number, since it is larger than the sum of its proper divisors (1207484253).

2656465251 is a wasteful number, since it uses less digits than its factorization.

2656465251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80498961.

The product of its digits is 432000, while the sum is 42.

The square root of 2656465251 is about 51540.9085193499. The cubic root of 2656465251 is about 1384.9519723383.

The spelling of 2656465251 in words is "two billion, six hundred fifty-six million, four hundred sixty-five thousand, two hundred fifty-one".