100115323540 has 24 divisors (see below), whose sum is σ = 211581308232. Its totient is φ = 39791057280.

The previous prime is 100115323523. The next prime is 100115323547. The reversal of 100115323540 is 45323511001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4136805124 + 95978518416 = 64318^2 + 309804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100115323547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15938791 + ... + 15945070.

It is an arithmetic number, because the mean of its divisors is an integer number (8815887843).

Almost surely, 2^100115323540 is an apocalyptic number.

100115323540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100115323540 is an abundant number, since it is smaller than the sum of its proper divisors (111465984692).

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

100115323540 is a wasteful number, since it uses less digits than its factorization.

100115323540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31884027 (or 31884025 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 100115323540 its reverse (45323511001), we get a palindrome (145438834541).

The spelling of 100115323540 in words is "one hundred billion, one hundred fifteen million, three hundred twenty-three thousand, five hundred forty".