2566402015 has 4 divisors (see below), whose sum is σ = 3079682424. Its totient is φ = 2053121608.

The previous prime is 2566401983. The next prime is 2566402039. The reversal of 2566402015 is 5102046652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2566402015 - 2⁵ = 2566401983 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256640197 + ... + 256640206.

It is an arithmetic number, because the mean of its divisors is an integer number (769920606).

Almost surely, 2^2566402015 is an apocalyptic number.

2566402015 is a deficient number, since it is larger than the sum of its proper divisors (513280409).

2566402015 is an equidigital number, since it uses as much as digits as its factorization.

2566402015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513280408.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 2566402015 is about 50659.6685243794. The cubic root of 2566402015 is about 1369.1201509562.

Adding to 2566402015 its reverse (5102046652), we get a palindrome (7668448667).

The spelling of 2566402015 in words is "two billion, five hundred sixty-six million, four hundred two thousand, fifteen".