55818381359 has 16 divisors (see below), whose sum is σ = 62243989920. Its totient is φ = 49700703360.

The previous prime is 55818381343. The next prime is 55818381373. The reversal of 55818381359 is 95318381855.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 55818381359 - 2⁴ = 55818381343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55818321359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330224 + ... + 469770.

It is an arithmetic number, because the mean of its divisors is an integer number (3890249370).

Almost surely, 2^55818381359 is an apocalyptic number.

55818381359 is a deficient number, since it is larger than the sum of its proper divisors (6425608561).

55818381359 is a wasteful number, since it uses less digits than its factorization.

55818381359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140650.

The product of its digits is 5184000, while the sum is 56.

The spelling of 55818381359 in words is "fifty-five billion, eight hundred eighteen million, three hundred eighty-one thousand, three hundred fifty-nine".