2554261861 has 4 divisors (see below), whose sum is σ = 2554497900. Its totient is φ = 2554025824.

The previous prime is 2554261841. The next prime is 2554261921. The reversal of 2554261861 is 1681624552.

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 888397636 + 1665864225 = 29806^2 + 40815^2 .

It is a cyclic number.

It is not a de Polignac number, because 2554261861 - 2³¹ = 406778213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2554261841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100966 + ... + 123703.

It is an arithmetic number, because the mean of its divisors is an integer number (638624475).

Almost surely, 2^2554261861 is an apocalyptic number.

It is an amenable number.

2554261861 is a deficient number, since it is larger than the sum of its proper divisors (236039).

2554261861 is a wasteful number, since it uses less digits than its factorization.

2554261861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236038.

The product of its digits is 115200, while the sum is 40.

The square root of 2554261861 is about 50539.7057866387. The cubic root of 2554261861 is about 1366.9579010975.

The spelling of 2554261861 in words is "two billion, five hundred fifty-four million, two hundred sixty-one thousand, eight hundred sixty-one".