78424574442 has 16 divisors (see below), whose sum is σ = 161908799232. Its totient is φ = 25298249760.

The previous prime is 78424574383. The next prime is 78424574443. The reversal of 78424574442 is 24447542487.

It is a super-2 number, since 2×78424574442² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78424574443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210818563 + ... + 210818934.

It is an arithmetic number, because the mean of its divisors is an integer number (10119299952).

Almost surely, 2^78424574442 is an apocalyptic number.

78424574442 is an abundant number, since it is smaller than the sum of its proper divisors (83484224790).

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

78424574442 is a wasteful number, since it uses less digits than its factorization.

78424574442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421637533.

The product of its digits is 8028160, while the sum is 51.

The spelling of 78424574442 in words is "seventy-eight billion, four hundred twenty-four million, five hundred seventy-four thousand, four hundred forty-two".