55051177561 has 4 divisors (see below), whose sum is σ = 55618715572. Its totient is φ = 54483639552.

The previous prime is 55051177529. The next prime is 55051177637. The reversal of 55051177561 is 16577115055.

55051177561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15075173961 + 39976003600 = 122781^2 + 199940^2 .

It is a cyclic number.

It is not a de Polignac number, because 55051177561 - 2⁵ = 55051177529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55051177661) 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, 283768860 + ... + 283769053.

It is an arithmetic number, because the mean of its divisors is an integer number (13904678893).

Almost surely, 2^55051177561 is an apocalyptic number.

It is an amenable number.

55051177561 is a deficient number, since it is larger than the sum of its proper divisors (567538011).

55051177561 is an equidigital number, since it uses as much as digits as its factorization.

55051177561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567538010.

The product of its (nonzero) digits is 183750, while the sum is 43.

The spelling of 55051177561 in words is "fifty-five billion, fifty-one million, one hundred seventy-seven thousand, five hundred sixty-one".