72112187838 has 8 divisors (see below), whose sum is σ = 144224375688. Its totient is φ = 24037395944.

The previous prime is 72112187821. The next prime is 72112187863. The reversal of 72112187838 is 83878121127.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

72112187838 is an admirable number.

It is a super-2 number, since 2×72112187838² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6009348981 + ... + 6009348992.

It is an arithmetic number, because the mean of its divisors is an integer number (18028046961).

Almost surely, 2^72112187838 is an apocalyptic number.

72112187838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

72112187838 is a wasteful number, since it uses less digits than its factorization.

72112187838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12018697978.

The product of its digits is 301056, while the sum is 48.

The spelling of 72112187838 in words is "seventy-two billion, one hundred twelve million, one hundred eighty-seven thousand, eight hundred thirty-eight".