100809642408 has 64 divisors (see below), whose sum is σ = 256095120960. Its totient is φ = 33064421376.

The previous prime is 100809642397. The next prime is 100809642431. The reversal of 100809642408 is 804246908001.

It is a self number, because there is not a number n which added to its sum of digits gives 100809642408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277591 + ... + 527897.

It is an arithmetic number, because the mean of its divisors is an integer number (4001486265).

Almost surely, 2^100809642408 is an apocalyptic number.

It is an amenable number.

100809642408 is an abundant number, since it is smaller than the sum of its proper divisors (155285478552).

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

100809642408 is a wasteful number, since it uses less digits than its factorization.

100809642408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250586 (or 250582 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The spelling of 100809642408 in words is "one hundred billion, eight hundred nine million, six hundred forty-two thousand, four hundred eight".