78220888124 has 12 divisors (see below), whose sum is σ = 137037482904. Its totient is φ = 39067321584.

The previous prime is 78220888111. The next prime is 78220888127. The reversal of 78220888124 is 42188802287.

It is a super-2 number, since 2×78220888124² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78220888127) 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, 10776539 + ... + 10783794.

It is an arithmetic number, because the mean of its divisors is an integer number (11419790242).

Almost surely, 2^78220888124 is an apocalyptic number.

It is an amenable number.

78220888124 is a deficient number, since it is larger than the sum of its proper divisors (58816594780).

78220888124 is a wasteful number, since it uses less digits than its factorization.

78220888124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21561244 (or 21561242 counting only the distinct ones).

The product of its (nonzero) digits is 917504, while the sum is 50.

The spelling of 78220888124 in words is "seventy-eight billion, two hundred twenty million, eight hundred eighty-eight thousand, one hundred twenty-four".