72521338207 has 16 divisors (see below), whose sum is σ = 80489499552. Its totient is φ = 65041966080.

The previous prime is 72521338187. The next prime is 72521338231. The reversal of 72521338207 is 70283312527.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72521338207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72521338207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72521338297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1179888 + ... + 1239829.

It is an arithmetic number, because the mean of its divisors is an integer number (5030593722).

Almost surely, 2^72521338207 is an apocalyptic number.

72521338207 is a deficient number, since it is larger than the sum of its proper divisors (7968161345).

72521338207 is a wasteful number, since it uses less digits than its factorization.

72521338207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2419818.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 72521338207 in words is "seventy-two billion, five hundred twenty-one million, three hundred thirty-eight thousand, two hundred seven".