78872041692 has 72 divisors (see below), whose sum is σ = 208317957120. Its totient is φ = 25113924000.

The previous prime is 78872041663. The next prime is 78872041693. The reversal of 78872041692 is 29614027887.

It is a happy number.

78872041692 is a `hidden beast` number, since 78 + 8 + 72 + 0 + 416 + 92 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78872041693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 558409 + ... + 685247.

It is an arithmetic number, because the mean of its divisors is an integer number (2893304960).

Almost surely, 2^78872041692 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78872041692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104158978560).

78872041692 is an abundant number, since it is smaller than the sum of its proper divisors (129445915428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78872041692 is a wasteful number, since it uses less digits than its factorization.

78872041692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127623 (or 127618 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 78872041692 in words is "seventy-eight billion, eight hundred seventy-two million, forty-one thousand, six hundred ninety-two".