55806426657 has 16 divisors (see below), whose sum is σ = 82854772480. Its totient is φ = 37123921296.

The previous prime is 55806426569. The next prime is 55806426659. The reversal of 55806426657 is 75662460855.

55806426657 is a `hidden beast` number, since 5 + 580 + 6 + 4 + 2 + 6 + 6 + 57 = 666.

It is not a de Polignac number, because 55806426657 - 2²⁰ = 55805378081 is a prime.

It is a super-3 number, since 3×55806426657³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55806426659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2219578 + ... + 2244579.

It is an arithmetic number, because the mean of its divisors is an integer number (5178423280).

Almost surely, 2^55806426657 is an apocalyptic number.

It is an amenable number.

55806426657 is a deficient number, since it is larger than the sum of its proper divisors (27048345823).

55806426657 is a wasteful number, since it uses less digits than its factorization.

55806426657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4464629 (or 4464623 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 54.

The spelling of 55806426657 in words is "fifty-five billion, eight hundred six million, four hundred twenty-six thousand, six hundred fifty-seven".