100091909550 has 48 divisors (see below), whose sum is σ = 248348680560. Its totient is φ = 26678192640.

The previous prime is 100091909539. The next prime is 100091909551. The reversal of 100091909550 is 55909190001.

It is a junction number, because it is equal to n+sod(n) for n = 100091909499 and 100091909508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100091909551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149094 + ... + 471606.

It is an arithmetic number, because the mean of its divisors is an integer number (5173930845).

Almost surely, 2^100091909550 is an apocalyptic number.

100091909550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100091909550 is an abundant number, since it is smaller than the sum of its proper divisors (148256771010).

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

100091909550 is a wasteful number, since it uses less digits than its factorization.

100091909550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324597 (or 324592 counting only the distinct ones).

The product of its (nonzero) digits is 18225, while the sum is 39.

The spelling of 100091909550 in words is "one hundred billion, ninety-one million, nine hundred nine thousand, five hundred fifty".