115981917147 has 16 divisors (see below), whose sum is σ = 171871240480. Its totient is φ = 77300498016.

The previous prime is 115981917131. The next prime is 115981917179. The reversal of 115981917147 is 741719189511.

115981917147 is a `hidden beast` number, since 1 + 1 + 598 + 1 + 9 + 1 + 7 + 1 + 47 = 666.

It is not a de Polignac number, because 115981917147 - 2⁴ = 115981917131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115981917093 and 115981917102.

It is not an unprimeable number, because it can be changed into a prime (115981917347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474568 + ... + 676149.

It is an arithmetic number, because the mean of its divisors is an integer number (10741952530).

Almost surely, 2^115981917147 is an apocalyptic number.

115981917147 is a deficient number, since it is larger than the sum of its proper divisors (55889323333).

115981917147 is a wasteful number, since it uses less digits than its factorization.

115981917147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154459 (or 1154453 counting only the distinct ones).

The product of its digits is 635040, while the sum is 54.

The spelling of 115981917147 in words is "one hundred fifteen billion, nine hundred eighty-one million, nine hundred seventeen thousand, one hundred forty-seven".