55056651661 has 4 divisors (see below), whose sum is σ = 60061801824. Its totient is φ = 50051501500.

The previous prime is 55056651619. The next prime is 55056651667. The reversal of 55056651661 is 16615665055.

55056651661 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55056651661 - 2⁹ = 55056651149 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 (55056651667) 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, 2502575065 + ... + 2502575086.

It is an arithmetic number, because the mean of its divisors is an integer number (15015450456).

Almost surely, 2^55056651661 is an apocalyptic number.

It is an amenable number.

55056651661 is a deficient number, since it is larger than the sum of its proper divisors (5005150163).

55056651661 is a wasteful number, since it uses less digits than its factorization.

55056651661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5005150162.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 55056651661 in words is "fifty-five billion, fifty-six million, six hundred fifty-one thousand, six hundred sixty-one".