55800077999 has 4 divisors (see below), whose sum is σ = 55805088720. Its totient is φ = 55795067280.

The previous prime is 55800077987. The next prime is 55800078017. The reversal of 55800077999 is 99977000855.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55800077999 is a prime.

It is a super-2 number, since 2×55800077999² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55800077969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2488619 + ... + 2510940.

It is an arithmetic number, because the mean of its divisors is an integer number (13951272180).

Almost surely, 2^55800077999 is an apocalyptic number.

55800077999 is a deficient number, since it is larger than the sum of its proper divisors (5010721).

55800077999 is a wasteful number, since it uses less digits than its factorization.

55800077999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5010720.

The product of its (nonzero) digits is 7144200, while the sum is 59.

The spelling of 55800077999 in words is "fifty-five billion, eight hundred million, seventy-seven thousand, nine hundred ninety-nine".