100161555400 has 96 divisors (see below), whose sum is σ = 247149895680. Its totient is φ = 37619840000.

The previous prime is 100161555397. The next prime is 100161555413. The reversal of 100161555400 is 4555161001.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1431225 + ... + 1499575.

It is an arithmetic number, because the mean of its divisors is an integer number (2574478080).

Almost surely, 2^100161555400 is an apocalyptic number.

100161555400 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 100161555400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123574947840).

100161555400 is an abundant number, since it is smaller than the sum of its proper divisors (146988340280).

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

100161555400 is a wasteful number, since it uses less digits than its factorization.

100161555400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68815 (or 68806 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 100161555400 in words is "one hundred billion, one hundred sixty-one million, five hundred fifty-five thousand, four hundred".