55688899999 has 16 divisors (see below), whose sum is σ = 61898480640. Its totient is φ = 49862609280.

The previous prime is 55688899961. The next prime is 55688900023. The reversal of 55688899999 is 99999888655.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 55688899999 - 2¹³ = 55688891807 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55688894999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 864429 + ... + 926614.

It is an arithmetic number, because the mean of its divisors is an integer number (3868655040).

Almost surely, 2^55688899999 is an apocalyptic number.

55688899999 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

55688899999 is a deficient number, since it is larger than the sum of its proper divisors (6209580641).

55688899999 is a wasteful number, since it uses less digits than its factorization.

55688899999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791150.

The product of its digits is 4534963200, while the sum is 85.

The spelling of 55688899999 in words is "fifty-five billion, six hundred eighty-eight million, eight hundred ninety-nine thousand, nine hundred ninety-nine".