115906381581 has 8 divisors (see below), whose sum is σ = 155565298624. Its totient is φ = 76759192800.

The previous prime is 115906381579. The next prime is 115906381589. The reversal of 115906381581 is 185183609511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 115906381581 - 2¹ = 115906381579 is a prime.

It is a super-2 number, since 2×115906381581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115906381581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115906381589) 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, 127931536 + ... + 127932441.

It is an arithmetic number, because the mean of its divisors is an integer number (19445662328).

Almost surely, 2^115906381581 is an apocalyptic number.

It is an amenable number.

115906381581 is a deficient number, since it is larger than the sum of its proper divisors (39658917043).

115906381581 is a wasteful number, since it uses less digits than its factorization.

115906381581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255864131.

The product of its (nonzero) digits is 259200, while the sum is 48.

The spelling of 115906381581 in words is "one hundred fifteen billion, nine hundred six million, three hundred eighty-one thousand, five hundred eighty-one".