115166649993 has 4 divisors (see below), whose sum is σ = 153555533328. Its totient is φ = 76777766660.

The previous prime is 115166649971. The next prime is 115166650007. The reversal of 115166649993 is 399946661511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 399946661511 = 3 ⋅133315553837.

It is a cyclic number.

It is not a de Polignac number, because 115166649993 - 2⁶ = 115166649929 is a prime.

It is a super-2 number, since 2×115166649993² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (115166649943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19194441663 + ... + 19194441668.

It is an arithmetic number, because the mean of its divisors is an integer number (38388883332).

Almost surely, 2^115166649993 is an apocalyptic number.

It is an amenable number.

115166649993 is a deficient number, since it is larger than the sum of its proper divisors (38388883335).

115166649993 is an equidigital number, since it uses as much as digits as its factorization.

115166649993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38388883334.

The product of its digits is 9447840, while the sum is 60.

The spelling of 115166649993 in words is "one hundred fifteen billion, one hundred sixty-six million, six hundred forty-nine thousand, nine hundred ninety-three".