2569798985 has 32 divisors (see below), whose sum is σ = 3390266880. Its totient is φ = 1858353408.

The previous prime is 2569798961. The next prime is 2569799027. The reversal of 2569798985 is 5898979652.

It is a cyclic number.

It is not a de Polignac number, because 2569798985 - 2⁸ = 2569798729 is a prime.

It is a super-4 number, since 4×2569798985⁴ (a number of 39 digits) contains 4444 as substring.

It is a Curzon number.

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, 1122512 + ... + 1124798.

It is an arithmetic number, because the mean of its divisors is an integer number (105945840).

Almost surely, 2^2569798985 is an apocalyptic number.

It is an amenable number.

2569798985 is a deficient number, since it is larger than the sum of its proper divisors (820467895).

2569798985 is a wasteful number, since it uses less digits than its factorization.

2569798985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657.

The product of its digits is 97977600, while the sum is 68.

The square root of 2569798985 is about 50693.1847983533. The cubic root of 2569798985 is about 1369.7239547188.

The spelling of 2569798985 in words is "two billion, five hundred sixty-nine million, seven hundred ninety-eight thousand, nine hundred eighty-five".