72554719997 has 16 divisors (see below), whose sum is σ = 75849404400. Its totient is φ = 69347266560.

The previous prime is 72554719981. The next prime is 72554720033. The reversal of 72554719997 is 79991745527.

It can be written as a sum of positive squares in 8 ways, for example, as 28787569561 + 43767150436 = 169669^2 + 209206^2 .

It is a cyclic number.

It is not a de Polignac number, because 72554719997 - 2⁴ = 72554719981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72554719297) 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 in 15 ways as a sum of consecutive naturals, for example, 306533 + ... + 488949.

It is an arithmetic number, because the mean of its divisors is an integer number (4740587775).

Almost surely, 2^72554719997 is an apocalyptic number.

It is an amenable number.

72554719997 is a deficient number, since it is larger than the sum of its proper divisors (3294684403).

72554719997 is a wasteful number, since it uses less digits than its factorization.

72554719997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182656.

The product of its digits is 50009400, while the sum is 65.

The spelling of 72554719997 in words is "seventy-two billion, five hundred fifty-four million, seven hundred nineteen thousand, nine hundred ninety-seven".