2556246651 has 24 divisors (see below), whose sum is σ = 3966803280. Its totient is φ = 1459971072.

The previous prime is 2556246631. The next prime is 2556246653. The reversal of 2556246651 is 1566426552.

It is a happy number.

It is not a de Polignac number, because 2556246651 - 2⁷ = 2556246523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2556246653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 433515 + ... + 439371.

It is an arithmetic number, because the mean of its divisors is an integer number (165283470).

Almost surely, 2^2556246651 is an apocalyptic number.

2556246651 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2556246651 is a deficient number, since it is larger than the sum of its proper divisors (1410556629).

2556246651 is a wasteful number, since it uses less digits than its factorization.

2556246651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8843 (or 8836 counting only the distinct ones).

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

The square root of 2556246651 is about 50559.3379209024. The cubic root of 2556246651 is about 1367.3118744537.

The spelling of 2556246651 in words is "two billion, five hundred fifty-six million, two hundred forty-six thousand, six hundred fifty-one".