100855990040 has 128 divisors (see below), whose sum is σ = 257095944000. Its totient is φ = 35345307648.

The previous prime is 100855990031. The next prime is 100855990051. The reversal of 100855990040 is 40099558001.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 100855990040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 833042 + ... + 946398.

Almost surely, 2^100855990040 is an apocalyptic number.

100855990040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100855990040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128547972000).

100855990040 is an abundant number, since it is smaller than the sum of its proper divisors (156239953960).

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

100855990040 is a wasteful number, since it uses less digits than its factorization.

100855990040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113469 (or 113465 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 100855990040 in words is "one hundred billion, eight hundred fifty-five million, nine hundred ninety thousand, forty".