2565121198 has 8 divisors (see below), whose sum is σ = 3882981960. Its totient is φ = 1270793880.

The previous prime is 2565121193. The next prime is 2565121199. The reversal of 2565121198 is 8911215652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2565121198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565121193) 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, 5883088 + ... + 5883523.

It is an arithmetic number, because the mean of its divisors is an integer number (485372745).

Almost surely, 2^2565121198 is an apocalyptic number.

2565121198 is a deficient number, since it is larger than the sum of its proper divisors (1317860762).

2565121198 is a wasteful number, since it uses less digits than its factorization.

2565121198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11766722.

The product of its digits is 43200, while the sum is 40.

The square root of 2565121198 is about 50647.0255592567. The cubic root of 2565121198 is about 1368.8923503028.

The spelling of 2565121198 in words is "two billion, five hundred sixty-five million, one hundred twenty-one thousand, one hundred ninety-eight".