72687150505201 has 4 divisors (see below), whose sum is σ = 73056120812532. Its totient is φ = 72318180197872.

The previous prime is 72687150505199. The next prime is 72687150505223. The reversal of 72687150505201 is 10250505178627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63463927280625 + 9223223224576 = 7966425^2 + 3036976^2 .

It is a cyclic number.

It is not a de Polignac number, because 72687150505201 - 2¹ = 72687150505199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72687150505231) 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 3 ways as a sum of consecutive naturals, for example, 184485153370 + ... + 184485153763.

It is an arithmetic number, because the mean of its divisors is an integer number (18264030203133).

Almost surely, 2^{72687150505201} is an apocalyptic number.

It is an amenable number.

72687150505201 is a deficient number, since it is larger than the sum of its proper divisors (368970307331).

72687150505201 is a wasteful number, since it uses less digits than its factorization.

72687150505201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368970307330.

The product of its (nonzero) digits is 1176000, while the sum is 49.

The spelling of 72687150505201 in words is "seventy-two trillion, six hundred eighty-seven billion, one hundred fifty million, five hundred five thousand, two hundred one".