55897601993 has 4 divisors (see below), whose sum is σ = 57825105540. Its totient is φ = 53970098448.

The previous prime is 55897601987. The next prime is 55897602011. The reversal of 55897601993 is 39910679855.

55897601993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39910679855 = 5 ⋅7982135971.

It can be written as a sum of positive squares in 2 ways, for example, as 13314390544 + 42583211449 = 115388^2 + 206357^2 .

It is a cyclic number.

It is not a de Polignac number, because 55897601993 - 2²⁴ = 55880824777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55897601093) 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, 963751730 + ... + 963751787.

It is an arithmetic number, because the mean of its divisors is an integer number (14456276385).

Almost surely, 2^55897601993 is an apocalyptic number.

It is an amenable number.

55897601993 is a deficient number, since it is larger than the sum of its proper divisors (1927503547).

55897601993 is a wasteful number, since it uses less digits than its factorization.

55897601993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927503546.

The product of its (nonzero) digits is 18370800, while the sum is 62.

The spelling of 55897601993 in words is "fifty-five billion, eight hundred ninety-seven million, six hundred one thousand, nine hundred ninety-three".