115197949440 has 1280 divisors, whose sum is σ = 492611328000. Its totient is φ = 25491013632.

The previous prime is 115197949381. The next prime is 115197949463. The reversal of 115197949440 is 44949791511.

It is a happy number.

115197949440 is a `hidden beast` number, since 1 + 1 + 5 + 197 + 9 + 4 + 9 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (1280).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1019450824 + ... + 1019450936.

It is an arithmetic number, because the mean of its divisors is an integer number (384852600).

Almost surely, 2^115197949440 is an apocalyptic number.

115197949440 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 115197949440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246305664000).

115197949440 is an abundant number, since it is smaller than the sum of its proper divisors (377413378560).

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

115197949440 is an equidigital number, since it uses as much as digits as its factorization.

115197949440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 115197949440 in words is "one hundred fifteen billion, one hundred ninety-seven million, nine hundred forty-nine thousand, four hundred forty".