55555091000 has 64 divisors (see below), whose sum is σ = 131644656000. Its totient is φ = 21940713600.

The previous prime is 55555090931. The next prime is 55555091003. The reversal of 55555091000 is 19055555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555091003) 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, 272615 + ... + 430614.

It is an arithmetic number, because the mean of its divisors is an integer number (2056947750).

Almost surely, 2^55555091000 is an apocalyptic number.

55555091000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55555091000 is an abundant number, since it is smaller than the sum of its proper divisors (76089565000).

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

55555091000 is a wasteful number, since it uses less digits than its factorization.

55555091000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703329 (or 703315 counting only the distinct ones).

The product of its (nonzero) digits is 28125, while the sum is 35.

The spelling of 55555091000 in words is "fifty-five billion, five hundred fifty-five million, ninety-one thousand".