55808617897 has 2 divisors, whose sum is σ = 55808617898. Its totient is φ = 55808617896.

The previous prime is 55808617877. The next prime is 55808617933. The reversal of 55808617897 is 79871680855.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55804140441 + 4477456 = 236229^2 + 2116^2 .

It is a cyclic number.

It is not a de Polignac number, because 55808617897 - 2²⁷ = 55674400169 is a prime.

It is a super-2 number, since 2×55808617897² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55808617877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27904308948 + 27904308949.

It is an arithmetic number, because the mean of its divisors is an integer number (27904308949).

Almost surely, 2^55808617897 is an apocalyptic number.

It is an amenable number.

55808617897 is a deficient number, since it is larger than the sum of its proper divisors (1).

55808617897 is an equidigital number, since it uses as much as digits as its factorization.

55808617897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33868800, while the sum is 64.

The spelling of 55808617897 in words is "fifty-five billion, eight hundred eight million, six hundred seventeen thousand, eight hundred ninety-seven".