72000000000 has 390 divisors, whose sum is σ = 259968235098. Its totient is φ = 19200000000.

The previous prime is 71999999999. The next prime is 72000000011. The reversal of 72000000000 is 27.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 19004276736 + 52995723264 = 137856^2 + 230208^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 14399999998 + ... + 14400000002.

Almost surely, 2^72000000000 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 72000000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129984117549).

72000000000 is an abundant number, since it is smaller than the sum of its proper divisors (187968235098).

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

72000000000 is an frugal number, since it uses more digits than its factorization.

72000000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 14, while the sum is 9.

Adding to 72000000000 its reverse (27), we get a palindrome (72000000027).

The spelling of 72000000000 in words is "seventy-two billion", and thus it is an aban number and an uban number.