55195195985 has 16 divisors (see below), whose sum is σ = 69968396160. Its totient is φ = 41683259520.

The previous prime is 55195195981. The next prime is 55195196003. The reversal of 55195195985 is 58959159155.

It is not a de Polignac number, because 55195195985 - 2² = 55195195981 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55195195981) 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, 1007117 + ... + 1060506.

It is an arithmetic number, because the mean of its divisors is an integer number (4373024760).

Almost surely, 2^55195195985 is an apocalyptic number.

It is an amenable number.

55195195985 is a deficient number, since it is larger than the sum of its proper divisors (14773200175).

55195195985 is a wasteful number, since it uses less digits than its factorization.

55195195985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067928.

The product of its digits is 18225000, while the sum is 62.

The spelling of 55195195985 in words is "fifty-five billion, one hundred ninety-five million, one hundred ninety-five thousand, nine hundred eighty-five".