55581651361 has 2 divisors, whose sum is σ = 55581651362. Its totient is φ = 55581651360.

The previous prime is 55581651347. The next prime is 55581651413. The reversal of 55581651361 is 16315618555.

55581651361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53121491361 + 2460160000 = 230481^2 + 49600^2 .

It is a cyclic number.

It is not a de Polignac number, because 55581651361 - 2³¹ = 53434167713 is a prime.

It is not a weakly prime, because it can be changed into another prime (55581681361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27790825680 + 27790825681.

It is an arithmetic number, because the mean of its divisors is an integer number (27790825681).

Almost surely, 2^55581651361 is an apocalyptic number.

It is an amenable number.

55581651361 is a deficient number, since it is larger than the sum of its proper divisors (1).

55581651361 is an equidigital number, since it uses as much as digits as its factorization.

55581651361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540000, while the sum is 46.

The spelling of 55581651361 in words is "fifty-five billion, five hundred eighty-one million, six hundred fifty-one thousand, three hundred sixty-one".