55691729850 has 48 divisors (see below), whose sum is σ = 138179004192. Its totient is φ = 14844298560.

The previous prime is 55691729813. The next prime is 55691729869. The reversal of 55691729850 is 5892719655.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 246184 + ... + 414716.

It is an arithmetic number, because the mean of its divisors is an integer number (2878729254).

Almost surely, 2^55691729850 is an apocalyptic number.

55691729850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55691729850 is an abundant number, since it is smaller than the sum of its proper divisors (82487274342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55691729850 is a wasteful number, since it uses less digits than its factorization.

55691729850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170751 (or 170746 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 57.

The spelling of 55691729850 in words is "fifty-five billion, six hundred ninety-one million, seven hundred twenty-nine thousand, eight hundred fifty".