2456855551 has 2 divisors, whose sum is σ = 2456855552. Its totient is φ = 2456855550.

The previous prime is 2456855549. The next prime is 2456855567. The reversal of 2456855551 is 1555586542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2456855551 - 2¹ = 2456855549 is a prime.

It is a super-2 number, since 2×2456855551² = 12072278396959027202, which contains 22 as substring.

Together with 2456855549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2456855851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1228427775 + 1228427776.

It is an arithmetic number, because the mean of its divisors is an integer number (1228427776).

Almost surely, 2^2456855551 is an apocalyptic number.

2456855551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2456855551 is an equidigital number, since it uses as much as digits as its factorization.

2456855551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200000, while the sum is 46.

The square root of 2456855551 is about 49566.6778289609. The cubic root of 2456855551 is about 1349.3559893060.

The spelling of 2456855551 in words is "two billion, four hundred fifty-six million, eight hundred fifty-five thousand, five hundred fifty-one".