55806102857 has 4 divisors (see below), whose sum is σ = 55811594436. Its totient is φ = 55800611280.

The previous prime is 55806102853. The next prime is 55806102917. The reversal of 55806102857 is 75820160855.

It is a happy number.

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 17239427401 + 38566675456 = 131299^2 + 196384^2 .

It is a cyclic number.

It is not a de Polignac number, because 55806102857 - 2² = 55806102853 is a prime.

It is a super-2 number, since 2×55806102857² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55806102853) 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, 2730518 + ... + 2750879.

It is an arithmetic number, because the mean of its divisors is an integer number (13952898609).

Almost surely, 2^55806102857 is an apocalyptic number.

It is an amenable number.

55806102857 is a deficient number, since it is larger than the sum of its proper divisors (5491579).

55806102857 is a wasteful number, since it uses less digits than its factorization.

55806102857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5491578.

The product of its (nonzero) digits is 672000, while the sum is 47.

The spelling of 55806102857 in words is "fifty-five billion, eight hundred six million, one hundred two thousand, eight hundred fifty-seven".