55581602893 has 2 divisors, whose sum is σ = 55581602894. Its totient is φ = 55581602892.

The previous prime is 55581602851. The next prime is 55581602897. The reversal of 55581602893 is 39820618555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52245616329 + 3335986564 = 228573^2 + 57758^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55581602893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55581602893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55581602897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27790801446 + 27790801447.

It is an arithmetic number, because the mean of its divisors is an integer number (27790801447).

Almost surely, 2^55581602893 is an apocalyptic number.

It is an amenable number.

55581602893 is a deficient number, since it is larger than the sum of its proper divisors (1).

55581602893 is an equidigital number, since it uses as much as digits as its factorization.

55581602893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592000, while the sum is 52.

The spelling of 55581602893 in words is "fifty-five billion, five hundred eighty-one million, six hundred two thousand, eight hundred ninety-three".