2558144661 has 4 divisors (see below), whose sum is σ = 3410859552. Its totient is φ = 1705429772.

The previous prime is 2558144651. The next prime is 2558144671. The reversal of 2558144661 is 1664418552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2558144651) and next prime (2558144671).

It is a cyclic number.

It is not a de Polignac number, because 2558144661 - 2²⁷ = 2423926933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2558144651) 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, 426357441 + ... + 426357446.

It is an arithmetic number, because the mean of its divisors is an integer number (852714888).

Almost surely, 2^2558144661 is an apocalyptic number.

It is an amenable number.

2558144661 is a deficient number, since it is larger than the sum of its proper divisors (852714891).

2558144661 is an equidigital number, since it uses as much as digits as its factorization.

2558144661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852714890.

The product of its digits is 230400, while the sum is 42.

The square root of 2558144661 is about 50578.1045611636. The cubic root of 2558144661 is about 1367.6501998615.

The spelling of 2558144661 in words is "two billion, five hundred fifty-eight million, one hundred forty-four thousand, six hundred sixty-one".