72050368381 has 2 divisors, whose sum is σ = 72050368382. Its totient is φ = 72050368380.

The previous prime is 72050368339. The next prime is 72050368387. The reversal of 72050368381 is 18386305027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48598202500 + 23452165881 = 220450^2 + 153141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72050368381 is a prime.

It is a super-2 number, since 2×72050368381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72050368387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36025184190 + 36025184191.

It is an arithmetic number, because the mean of its divisors is an integer number (36025184191).

Almost surely, 2^72050368381 is an apocalyptic number.

It is an amenable number.

72050368381 is a deficient number, since it is larger than the sum of its proper divisors (1).

72050368381 is an equidigital number, since it uses as much as digits as its factorization.

72050368381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 72050368381 in words is "seventy-two billion, fifty million, three hundred sixty-eight thousand, three hundred eighty-one".