115291531008 has 144 divisors (see below), whose sum is σ = 344125877760. Its totient is φ = 38071102464.

The previous prime is 115291530997. The next prime is 115291531081. The reversal of 115291531008 is 800135192511.

115291531008 is a `hidden beast` number, since 11 + 529 + 15 + 3 + 100 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 661641 + ... + 817527.

It is an arithmetic number, because the mean of its divisors is an integer number (2389763040).

Almost surely, 2^115291531008 is an apocalyptic number.

115291531008 is a gapful number since it is divisible by the number (18) 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 115291531008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172062938880).

115291531008 is an abundant number, since it is smaller than the sum of its proper divisors (228834346752).

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

115291531008 is a wasteful number, since it uses less digits than its factorization.

115291531008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156019 (or 155999 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 36.

The spelling of 115291531008 in words is "one hundred fifteen billion, two hundred ninety-one million, five hundred thirty-one thousand, eight".