99178735873081 has 4 divisors (see below), whose sum is σ = 99178778161792. Its totient is φ = 99178693584372.

The previous prime is 99178735872991. The next prime is 99178735873117. The reversal of 99178735873081 is 18037853787199.

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.

It is a cyclic number.

It is not a de Polignac number, because 99178735873081 - 2¹³ = 99178735864889 is a prime.

It is a super-2 number, since 2×99178735873081² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99178735872989 and 99178735873007.

It is not an unprimeable number, because it can be changed into a prime (99178735843081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17406141 + ... + 22390426.

It is an arithmetic number, because the mean of its divisors is an integer number (24794694540448).

Almost surely, 2^{99178735873081} is an apocalyptic number.

It is an amenable number.

99178735873081 is a deficient number, since it is larger than the sum of its proper divisors (42288711).

99178735873081 is a wasteful number, since it uses less digits than its factorization.

99178735873081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42288710.

The product of its (nonzero) digits is 640120320, while the sum is 76.

The spelling of 99178735873081 in words is "ninety-nine trillion, one hundred seventy-eight billion, seven hundred thirty-five million, eight hundred seventy-three thousand, eighty-one".