2456888981 has 4 divisors (see below), whose sum is σ = 2465955264. Its totient is φ = 2447822700.

The previous prime is 2456888971. The next prime is 2456889047. The reversal of 2456888981 is 1898886542.

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 a de Polignac number, because none of the positive numbers 2^k-2456888981 is a prime.

It is a super-2 number, since 2×2456888981² = 12072606929918436722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2456888981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2456888921) 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, 4532735 + ... + 4533276.

It is an arithmetic number, because the mean of its divisors is an integer number (616488816).

Almost surely, 2^2456888981 is an apocalyptic number.

It is an amenable number.

2456888981 is a deficient number, since it is larger than the sum of its proper divisors (9066283).

2456888981 is an equidigital number, since it uses as much as digits as its factorization.

2456888981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9066282.

The product of its digits is 8847360, while the sum is 59.

The square root of 2456888981 is about 49567.0150503336. The cubic root of 2456888981 is about 1349.3621094279.

The spelling of 2456888981 in words is "two billion, four hundred fifty-six million, eight hundred eighty-eight thousand, nine hundred eighty-one".