72271780736 has 16 divisors (see below), whose sum is σ = 143978938440. Its totient is φ = 36135890304.

The previous prime is 72271780733. The next prime is 72271780771. The reversal of 72271780736 is 63708717227.

It is a tau number, because it is divible by the number of its divisors (16).

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 (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282311516 + ... + 282311771.

Almost surely, 2^72271780736 is an apocalyptic number.

It is an amenable number.

72271780736 is a deficient number, since it is larger than the sum of its proper divisors (71707157704).

72271780736 is an equidigital number, since it uses as much as digits as its factorization.

72271780736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564623301 (or 564623289 counting only the distinct ones).

The product of its (nonzero) digits is 1382976, while the sum is 50.

The spelling of 72271780736 in words is "seventy-two billion, two hundred seventy-one million, seven hundred eighty thousand, seven hundred thirty-six".