100505385440 has 24 divisors (see below), whose sum is σ = 237443973480. Its totient is φ = 40202154112.

The previous prime is 100505385437. The next prime is 100505385481. The reversal of 100505385440 is 44583505001.

It is a self number, because there is not a number n which added to its sum of digits gives 100505385440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314079170 + ... + 314079489.

It is an arithmetic number, because the mean of its divisors is an integer number (9893498895).

Almost surely, 2^100505385440 is an apocalyptic number.

100505385440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100505385440 is an abundant number, since it is smaller than the sum of its proper divisors (136938588040).

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

100505385440 is an equidigital number, since it uses as much as digits as its factorization.

100505385440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628158674 (or 628158666 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 100505385440 in words is "one hundred billion, five hundred five million, three hundred eighty-five thousand, four hundred forty".