2456979851 has 4 divisors (see below), whose sum is σ = 2586294600. Its totient is φ = 2327665104.

The previous prime is 2456979793. The next prime is 2456979887. The reversal of 2456979851 is 1589796542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1589796542 = 2 ⋅794898271.

It is a cyclic number.

It is not a de Polignac number, because 2456979851 - 2⁶ = 2456979787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2456978851) 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, 64657346 + ... + 64657383.

It is an arithmetic number, because the mean of its divisors is an integer number (646573650).

Almost surely, 2^2456979851 is an apocalyptic number.

2456979851 is a deficient number, since it is larger than the sum of its proper divisors (129314749).

2456979851 is a wasteful number, since it uses less digits than its factorization.

2456979851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129314748.

The product of its digits is 5443200, while the sum is 56.

The square root of 2456979851 is about 49567.9316796656. The cubic root of 2456979851 is about 1349.3787449677.

The spelling of 2456979851 in words is "two billion, four hundred fifty-six million, nine hundred seventy-nine thousand, eight hundred fifty-one".