55640552693 has 8 divisors (see below), whose sum is σ = 60842967456. Its totient is φ = 50462168400.

The previous prime is 55640552659. The next prime is 55640552701. The reversal of 55640552693 is 39625504655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55640552693 - 2¹⁰ = 55640551669 is a prime.

It is a super-2 number, since 2×55640552693² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55640582693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6002771 + ... + 6012032.

It is an arithmetic number, because the mean of its divisors is an integer number (7605370932).

Almost surely, 2^55640552693 is an apocalyptic number.

It is an amenable number.

55640552693 is a deficient number, since it is larger than the sum of its proper divisors (5202414763).

55640552693 is a wasteful number, since it uses less digits than its factorization.

55640552693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12015235.

The product of its (nonzero) digits is 4860000, while the sum is 50.

The spelling of 55640552693 in words is "fifty-five billion, six hundred forty million, five hundred fifty-two thousand, six hundred ninety-three".