72420749292 has 72 divisors (see below), whose sum is σ = 179639208000. Its totient is φ = 22703448320.

The previous prime is 72420749281. The next prime is 72420749321. The reversal of 72420749292 is 29294702427.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5191567 + ... + 5205497.

It is an arithmetic number, because the mean of its divisors is an integer number (2494989000).

Almost surely, 2^72420749292 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 72420749292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89819604000).

72420749292 is an abundant number, since it is smaller than the sum of its proper divisors (107218458708).

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

72420749292 is a wasteful number, since it uses less digits than its factorization.

72420749292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15471 (or 15452 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 48.

The spelling of 72420749292 in words is "seventy-two billion, four hundred twenty million, seven hundred forty-nine thousand, two hundred ninety-two".