55825791399 has 12 divisors (see below), whose sum is σ = 92156862096. Its totient is φ = 31900452192.

The previous prime is 55825791379. The next prime is 55825791421. The reversal of 55825791399 is 99319752855.

55825791399 is a `hidden beast` number, since 5 + 58 + 2 + 579 + 1 + 3 + 9 + 9 = 666.

It is not a de Polignac number, because 55825791399 - 2⁵ = 55825791367 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 886123673 = 55825791399 / (5 + 5 + 8 + 2 + 5 + 7 + 9 + 1 + 3 + 9 + 9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55825791319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 443061774 + ... + 443061899.

It is an arithmetic number, because the mean of its divisors is an integer number (7679738508).

Almost surely, 2^55825791399 is an apocalyptic number.

55825791399 is a deficient number, since it is larger than the sum of its proper divisors (36331070697).

55825791399 is a wasteful number, since it uses less digits than its factorization.

55825791399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886123686 (or 886123683 counting only the distinct ones).

The product of its digits is 30618000, while the sum is 63.

The spelling of 55825791399 in words is "fifty-five billion, eight hundred twenty-five million, seven hundred ninety-one thousand, three hundred ninety-nine".