55121734653 has 4 divisors (see below), whose sum is σ = 73495646208. Its totient is φ = 36747823100.

The previous prime is 55121734639. The next prime is 55121734669. The reversal of 55121734653 is 35643712155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55121734653 - 2⁵ = 55121734621 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55121734153) 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, 9186955773 + ... + 9186955778.

It is an arithmetic number, because the mean of its divisors is an integer number (18373911552).

Almost surely, 2^55121734653 is an apocalyptic number.

It is an amenable number.

55121734653 is a deficient number, since it is larger than the sum of its proper divisors (18373911555).

55121734653 is a wasteful number, since it uses less digits than its factorization.

55121734653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18373911554.

The product of its digits is 378000, while the sum is 42.

The spelling of 55121734653 in words is "fifty-five billion, one hundred twenty-one million, seven hundred thirty-four thousand, six hundred fifty-three".