2556515105 has 32 divisors (see below), whose sum is σ = 3170119680. Its totient is φ = 1978522560.

The previous prime is 2556515089. The next prime is 2556515119. The reversal of 2556515105 is 5015156552.

It is a happy number.

It is not a de Polignac number, because 2556515105 - 2⁴ = 2556515089 is a prime.

It is a super-2 number, since 2×2556515105² = 13071538964186322050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5082284 + ... + 5082786.

It is an arithmetic number, because the mean of its divisors is an integer number (99066240).

Almost surely, 2^2556515105 is an apocalyptic number.

It is an amenable number.

2556515105 is a deficient number, since it is larger than the sum of its proper divisors (613604575).

2556515105 is a wasteful number, since it uses less digits than its factorization.

2556515105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821.

The product of its (nonzero) digits is 37500, while the sum is 35.

The square root of 2556515105 is about 50561.9926921398. The cubic root of 2556515105 is about 1367.3597372702.

The spelling of 2556515105 in words is "two billion, five hundred fifty-six million, five hundred fifteen thousand, one hundred five".