72557286133 has 2 divisors, whose sum is σ = 72557286134. Its totient is φ = 72557286132.

The previous prime is 72557286119. The next prime is 72557286167. The reversal of 72557286133 is 33168275527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46520881969 + 26036404164 = 215687^2 + 161358^2 .

It is a cyclic number.

It is not a de Polignac number, because 72557286133 - 2⁹ = 72557285621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72557286533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36278643066 + 36278643067.

It is an arithmetic number, because the mean of its divisors is an integer number (36278643067).

Almost surely, 2^72557286133 is an apocalyptic number.

It is an amenable number.

72557286133 is a deficient number, since it is larger than the sum of its proper divisors (1).

72557286133 is an equidigital number, since it uses as much as digits as its factorization.

72557286133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2116800, while the sum is 49.

The spelling of 72557286133 in words is "seventy-two billion, five hundred fifty-seven million, two hundred eighty-six thousand, one hundred thirty-three".