100540421256 has 128 divisors (see below), whose sum is σ = 277033167360. Its totient is φ = 30153484800.

The previous prime is 100540421243. The next prime is 100540421263. The reversal of 100540421256 is 652124045001.

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, 12546291 + ... + 12554301.

It is an arithmetic number, because the mean of its divisors is an integer number (2164321620).

Almost surely, 2^100540421256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100540421256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138516583680).

100540421256 is an abundant number, since it is smaller than the sum of its proper divisors (176492746104).

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

100540421256 is a wasteful number, since it uses less digits than its factorization.

100540421256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8515 (or 8511 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 100540421256 its reverse (652124045001), we get a palindrome (752664466257).

The spelling of 100540421256 in words is "one hundred billion, five hundred forty million, four hundred twenty-one thousand, two hundred fifty-six".