72111530432 has 56 divisors (see below), whose sum is σ = 146116645536. Its totient is φ = 35301961728.

The previous prime is 72111530423. The next prime is 72111530437. The reversal of 72111530432 is 23403511127.

It is a junction number, because it is equal to n+sod(n) for n = 72111530395 and 72111530404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72111530437) 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, 583733 + ... + 696395.

Almost surely, 2^72111530432 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 72111530432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73058322768).

72111530432 is an abundant number, since it is smaller than the sum of its proper divisors (74005115104).

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

72111530432 is a wasteful number, since it uses less digits than its factorization.

72111530432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112885 (or 112875 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The spelling of 72111530432 in words is "seventy-two billion, one hundred eleven million, five hundred thirty thousand, four hundred thirty-two".