55664026693 has 4 divisors (see below), whose sum is σ = 60724392768. Its totient is φ = 50603660620.

The previous prime is 55664026669. The next prime is 55664026699. The reversal of 55664026693 is 39662046655.

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 55664026693 - 2¹⁷ = 55663895621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55664026693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55664026699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2530183021 + ... + 2530183042.

It is an arithmetic number, because the mean of its divisors is an integer number (15181098192).

Almost surely, 2^55664026693 is an apocalyptic number.

It is an amenable number.

55664026693 is a deficient number, since it is larger than the sum of its proper divisors (5060366075).

55664026693 is a wasteful number, since it uses less digits than its factorization.

55664026693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5060366074.

The product of its (nonzero) digits is 6998400, while the sum is 52.

The spelling of 55664026693 in words is "fifty-five billion, six hundred sixty-four million, twenty-six thousand, six hundred ninety-three".