2553586687921 has 4 divisors (see below), whose sum is σ = 2553593769972. Its totient is φ = 2553579605872.

The previous prime is 2553586687909. The next prime is 2553586688039. The reversal of 2553586687921 is 1297866853552.

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

It can be written as a sum of positive squares in 2 ways, for example, as 903762040896 + 1649824647025 = 950664^2 + 1284455^2 .

It is a cyclic number.

It is not a de Polignac number, because 2553586687921 - 2²⁹ = 2553049817009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2553586687621) 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, 2969410 + ... + 3731563.

It is an arithmetic number, because the mean of its divisors is an integer number (638398442493).

Almost surely, 2^{2553586687921} is an apocalyptic number.

It is an amenable number.

2553586687921 is a deficient number, since it is larger than the sum of its proper divisors (7082051).

2553586687921 is an equidigital number, since it uses as much as digits as its factorization.

2553586687921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7082050.

The product of its digits is 217728000, while the sum is 67.

The spelling of 2553586687921 in words is "two trillion, five hundred fifty-three billion, five hundred eighty-six million, six hundred eighty-seven thousand, nine hundred twenty-one".