78882171081 has 16 divisors (see below), whose sum is σ = 121551984000. Its totient is φ = 44569058688.

The previous prime is 78882171061. The next prime is 78882171089. The reversal of 78882171081 is 18017128887.

It is not a de Polignac number, because 78882171081 - 2⁷ = 78882170953 is a prime.

It is a super-2 number, since 2×78882171081² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78882171089) 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, 21100906 + ... + 21104643.

It is an arithmetic number, because the mean of its divisors is an integer number (7596999000).

Almost surely, 2^78882171081 is an apocalyptic number.

It is an amenable number.

78882171081 is a deficient number, since it is larger than the sum of its proper divisors (42669812919).

78882171081 is a wasteful number, since it uses less digits than its factorization.

78882171081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42205648.

The product of its (nonzero) digits is 401408, while the sum is 51.

The spelling of 78882171081 in words is "seventy-eight billion, eight hundred eighty-two million, one hundred seventy-one thousand, eighty-one".