2554345561 has 4 divisors (see below), whose sum is σ = 2556328500. Its totient is φ = 2552362624.

The previous prime is 2554345511. The next prime is 2554345601. The reversal of 2554345561 is 1655434552.

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 868421961 + 1685923600 = 29469^2 + 41060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2554345561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2554345511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 989536 + ... + 992113.

It is an arithmetic number, because the mean of its divisors is an integer number (639082125).

Almost surely, 2^2554345561 is an apocalyptic number.

It is an amenable number.

2554345561 is a deficient number, since it is larger than the sum of its proper divisors (1982939).

2554345561 is a wasteful number, since it uses less digits than its factorization.

2554345561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982938.

The product of its digits is 360000, while the sum is 40.

The square root of 2554345561 is about 50540.5338416602. The cubic root of 2554345561 is about 1366.9728321073.

The spelling of 2554345561 in words is "two billion, five hundred fifty-four million, three hundred forty-five thousand, five hundred sixty-one".