55115651565993 has 32 divisors (see below), whose sum is σ = 74456854940160. Its totient is φ = 36260117893760.

The previous prime is 55115651565977. The next prime is 55115651566013. The reversal of 55115651565993 is 39956515651155.

It is a cyclic number.

It is not a de Polignac number, because 55115651565993 - 2⁴ = 55115651565977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55115651565193) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2494925878 + ... + 2494947968.

It is an arithmetic number, because the mean of its divisors is an integer number (2326776716880).

Almost surely, 2^{55115651565993} is an apocalyptic number.

It is an amenable number.

55115651565993 is a deficient number, since it is larger than the sum of its proper divisors (19341203374167).

55115651565993 is a wasteful number, since it uses less digits than its factorization.

55115651565993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33029.

The product of its digits is 136687500, while the sum is 66.

The spelling of 55115651565993 in words is "fifty-five trillion, one hundred fifteen billion, six hundred fifty-one million, five hundred sixty-five thousand, nine hundred ninety-three".