100661250550 has 48 divisors (see below), whose sum is σ = 214583488992. Its totient is φ = 34414617600.

The previous prime is 100661250539. The next prime is 100661250563. The reversal of 100661250550 is 55052166001.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 283821 + ... + 530920.

It is an arithmetic number, because the mean of its divisors is an integer number (4470489354).

Almost surely, 2^100661250550 is an apocalyptic number.

100661250550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100661250550 is an abundant number, since it is smaller than the sum of its proper divisors (113922238442).

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

100661250550 is a wasteful number, since it uses less digits than its factorization.

100661250550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815113 (or 815108 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The spelling of 100661250550 in words is "one hundred billion, six hundred sixty-one million, two hundred fifty thousand, five hundred fifty".