2256477661 has 4 divisors (see below), whose sum is σ = 2304487872. Its totient is φ = 2208467452.

The previous prime is 2256477659. The next prime is 2256477683. The reversal of 2256477661 is 1667746522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2256477661 - 2¹ = 2256477659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256477611) 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, 24005035 + ... + 24005128.

It is an arithmetic number, because the mean of its divisors is an integer number (576121968).

Almost surely, 2^2256477661 is an apocalyptic number.

It is an amenable number.

2256477661 is a deficient number, since it is larger than the sum of its proper divisors (48010211).

2256477661 is an equidigital number, since it uses as much as digits as its factorization.

2256477661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48010210.

The product of its digits is 846720, while the sum is 46.

The square root of 2256477661 is about 47502.3963711306. The cubic root of 2256477661 is about 1311.6269940664.

The spelling of 2256477661 in words is "two billion, two hundred fifty-six million, four hundred seventy-seven thousand, six hundred sixty-one".