2556346517 has 4 divisors (see below), whose sum is σ = 2615796480. Its totient is φ = 2496896556.

The previous prime is 2556346511. The next prime is 2556346531. The reversal of 2556346517 is 7156436552.

It is a happy number.

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 2556346517 - 2⁴ = 2556346501 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 (2556346511) 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, 29724917 + ... + 29725002.

It is an arithmetic number, because the mean of its divisors is an integer number (653949120).

Almost surely, 2^2556346517 is an apocalyptic number.

It is an amenable number.

2556346517 is a deficient number, since it is larger than the sum of its proper divisors (59449963).

2556346517 is an equidigital number, since it uses as much as digits as its factorization.

2556346517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59449962.

The product of its digits is 756000, while the sum is 44.

The square root of 2556346517 is about 50560.3255230818. The cubic root of 2556346517 is about 1367.3296800111.

The spelling of 2556346517 in words is "two billion, five hundred fifty-six million, three hundred forty-six thousand, five hundred seventeen".