2566403842 has 32 divisors (see below), whose sum is σ = 4041487872. Its totient is φ = 1220940864.

The previous prime is 2566403837. The next prime is 2566403849. The reversal of 2566403842 is 2483046652.

It is a junction number, because it is equal to n+sod(n) for n = 2566403795 and 2566403804.

It is not an unprimeable number, because it can be changed into a prime (2566403849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1438483 + ... + 1440265.

It is an arithmetic number, because the mean of its divisors is an integer number (126296496).

Almost surely, 2^2566403842 is an apocalyptic number.

2566403842 is a deficient number, since it is larger than the sum of its proper divisors (1475084030).

2566403842 is a wasteful number, since it uses less digits than its factorization.

2566403842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242.

The product of its (nonzero) digits is 276480, while the sum is 40.

The square root of 2566403842 is about 50659.6865564721. The cubic root of 2566403842 is about 1369.1204758445.

The spelling of 2566403842 in words is "two billion, five hundred sixty-six million, four hundred three thousand, eight hundred forty-two".