72211706784 has 72 divisors (see below), whose sum is σ = 234688053600. Its totient is φ = 20631915648.

The previous prime is 72211706767. The next prime is 72211706797. The reversal of 72211706784 is 48760711227.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17907634 + ... + 17911665.

It is an arithmetic number, because the mean of its divisors is an integer number (3259556300).

Almost surely, 2^72211706784 is an apocalyptic number.

It is an amenable number.

72211706784 is an abundant number, since it is smaller than the sum of its proper divisors (162476346816).

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

72211706784 is a wasteful number, since it uses less digits than its factorization.

72211706784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35819322 (or 35819311 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The spelling of 72211706784 in words is "seventy-two billion, two hundred eleven million, seven hundred six thousand, seven hundred eighty-four".