55121653000 has 64 divisors (see below), whose sum is σ = 129024604800. Its totient is φ = 22041835200.

The previous prime is 55121652991. The next prime is 55121653021. The reversal of 55121653000 is 35612155.

It is a self number, because there is not a number n which added to its sum of digits gives 55121653000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4320631 + ... + 4333369.

It is an arithmetic number, because the mean of its divisors is an integer number (2016009450).

Almost surely, 2^55121653000 is an apocalyptic number.

55121653000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55121653000 is an abundant number, since it is smaller than the sum of its proper divisors (73902951800).

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

55121653000 is a wasteful number, since it uses less digits than its factorization.

55121653000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17087 (or 17073 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 55121653000 in words is "fifty-five billion, one hundred twenty-one million, six hundred fifty-three thousand".