55642101693 has 4 divisors (see below), whose sum is σ = 74189468928. Its totient is φ = 37094734460.

The previous prime is 55642101623. The next prime is 55642101707. The reversal of 55642101693 is 39610124655.

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 55642101693 - 2¹⁰ = 55642100669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55642101623) 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, 9273683613 + ... + 9273683618.

It is an arithmetic number, because the mean of its divisors is an integer number (18547367232).

Almost surely, 2^55642101693 is an apocalyptic number.

It is an amenable number.

55642101693 is a deficient number, since it is larger than the sum of its proper divisors (18547367235).

55642101693 is a wasteful number, since it uses less digits than its factorization.

55642101693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18547367234.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 55642101693 in words is "fifty-five billion, six hundred forty-two million, one hundred one thousand, six hundred ninety-three".