55197799535999 has 6 divisors (see below), whose sum is σ = 55236186707520. Its totient is φ = 55159439023676.

The previous prime is 55197799535971. The next prime is 55197799536017. The reversal of 55197799535999 is 99953599779155.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-55197799535999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55197799595999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11257439 + ... + 15398880.

It is an arithmetic number, because the mean of its divisors is an integer number (9206031117920).

Almost surely, 2^{55197799535999} is an apocalyptic number.

55197799535999 is a deficient number, since it is larger than the sum of its proper divisors (38387171521).

55197799535999 is an frugal number, since it uses more digits than its factorization.

55197799535999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26659197 (or 26657758 counting only the distinct ones).

The product of its digits is 48826141875, while the sum is 92.

The spelling of 55197799535999 in words is "fifty-five trillion, one hundred ninety-seven billion, seven hundred ninety-nine million, five hundred thirty-five thousand, nine hundred ninety-nine".