72188288042 has 32 divisors (see below), whose sum is σ = 118192730880. Its totient is φ = 32866741440.

The previous prime is 72188288023. The next prime is 72188288047. The reversal of 72188288042 is 24088288127.

It is a super-2 number, since 2×72188288042² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72188288047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2390228 + ... + 2420240.

It is an arithmetic number, because the mean of its divisors is an integer number (3693522840).

Almost surely, 2^72188288042 is an apocalyptic number.

72188288042 is a deficient number, since it is larger than the sum of its proper divisors (46004442838).

72188288042 is a wasteful number, since it uses less digits than its factorization.

72188288042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31278.

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

The spelling of 72188288042 in words is "seventy-two billion, one hundred eighty-eight million, two hundred eighty-eight thousand, forty-two".