72271780732 has 24 divisors (see below), whose sum is σ = 127141922880. Its totient is φ = 35945844480.

The previous prime is 72271780729. The next prime is 72271780733. The reversal of 72271780732 is 23708717227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72271780733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855432 + ... + 936112.

It is an arithmetic number, because the mean of its divisors is an integer number (5297580120).

Almost surely, 2^72271780732 is an apocalyptic number.

It is an amenable number.

72271780732 is a deficient number, since it is larger than the sum of its proper divisors (54870142148).

72271780732 is a wasteful number, since it uses less digits than its factorization.

72271780732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81861 (or 81859 counting only the distinct ones).

The product of its (nonzero) digits is 460992, while the sum is 46.

The spelling of 72271780732 in words is "seventy-two billion, two hundred seventy-one million, seven hundred eighty thousand, seven hundred thirty-two".