2557565865852 has 24 divisors (see below), whose sum is σ = 5971012011216. Its totient is φ = 852042194688.

The previous prime is 2557565865847. The next prime is 2557565865853. The reversal of 2557565865852 is 2585685657552.

It is a super-2 number, since 2×2557565865852² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557565865853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59947863 + ... + 59990510.

It is an arithmetic number, because the mean of its divisors is an integer number (248792167134).

Almost surely, 2^{2557565865852} is an apocalyptic number.

It is an amenable number.

2557565865852 is an abundant number, since it is smaller than the sum of its proper divisors (3413446145364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2557565865852 is a wasteful number, since it uses less digits than its factorization.

2557565865852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119940157 (or 119940155 counting only the distinct ones).

The product of its digits is 1008000000, while the sum is 69.

The spelling of 2557565865852 in words is "two trillion, five hundred fifty-seven billion, five hundred sixty-five million, eight hundred sixty-five thousand, eight hundred fifty-two".