55681102657 has 4 divisors (see below), whose sum is σ = 55707861636. Its totient is φ = 55654343680.

The previous prime is 55681102639. The next prime is 55681102699. The reversal of 55681102657 is 75620118655.

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 14521214016 + 41159888641 = 120504^2 + 202879^2 .

It is a cyclic number.

It is not a de Polignac number, because 55681102657 - 2³⁵ = 21321364289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55681109657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13376368 + ... + 13380529.

It is an arithmetic number, because the mean of its divisors is an integer number (13926965409).

Almost surely, 2^55681102657 is an apocalyptic number.

It is an amenable number.

55681102657 is a deficient number, since it is larger than the sum of its proper divisors (26758979).

55681102657 is a wasteful number, since it uses less digits than its factorization.

55681102657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26758978.

The product of its (nonzero) digits is 504000, while the sum is 46.

The spelling of 55681102657 in words is "fifty-five billion, six hundred eighty-one million, one hundred two thousand, six hundred fifty-seven".