55940101897 has 2 divisors, whose sum is σ = 55940101898. Its totient is φ = 55940101896.

The previous prime is 55940101879. The next prime is 55940101907. The reversal of 55940101897 is 79810104955.

Together with previous prime (55940101879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55936507081 + 3594816 = 236509^2 + 1896^2 .

It is a cyclic number.

It is not a de Polignac number, because 55940101897 - 2¹⁹ = 55939577609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55940101897.

It is not a weakly prime, because it can be changed into another prime (55940101097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27970050948 + 27970050949.

It is an arithmetic number, because the mean of its divisors is an integer number (27970050949).

Almost surely, 2^55940101897 is an apocalyptic number.

It is an amenable number.

55940101897 is a deficient number, since it is larger than the sum of its proper divisors (1).

55940101897 is an equidigital number, since it uses as much as digits as its factorization.

55940101897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 49.

The spelling of 55940101897 in words is "fifty-five billion, nine hundred forty million, one hundred one thousand, eight hundred ninety-seven".