72577805197 has 2 divisors, whose sum is σ = 72577805198. Its totient is φ = 72577805196.

The previous prime is 72577805191. The next prime is 72577805257. The reversal of 72577805197 is 79150877527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46924657641 + 25653147556 = 216621^2 + 160166^2 .

It is a cyclic number.

It is not a de Polignac number, because 72577805197 - 2¹¹ = 72577803149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72577805191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36288902598 + 36288902599.

It is an arithmetic number, because the mean of its divisors is an integer number (36288902599).

Almost surely, 2^72577805197 is an apocalyptic number.

It is an amenable number.

72577805197 is a deficient number, since it is larger than the sum of its proper divisors (1).

72577805197 is an equidigital number, since it uses as much as digits as its factorization.

72577805197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8643600, while the sum is 58.

The spelling of 72577805197 in words is "seventy-two billion, five hundred seventy-seven million, eight hundred five thousand, one hundred ninety-seven".