55561611051 has 24 divisors (see below), whose sum is σ = 81792322560. Its totient is φ = 36338569776.

The previous prime is 55561611019. The next prime is 55561611101. The reversal of 55561611051 is 15011616555.

It is a happy number.

It is not a de Polignac number, because 55561611051 - 2⁵ = 55561611019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55561610997 and 55561611015.

It is not an unprimeable number, because it can be changed into a prime (55561681051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180891 + ... + 379268.

It is an arithmetic number, because the mean of its divisors is an integer number (3408013440).

Almost surely, 2^55561611051 is an apocalyptic number.

55561611051 is a deficient number, since it is larger than the sum of its proper divisors (26230711509).

55561611051 is a wasteful number, since it uses less digits than its factorization.

55561611051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560375 (or 560372 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 55561611051 in words is "fifty-five billion, five hundred sixty-one million, six hundred eleven thousand, fifty-one".