72124951854881 has 2 divisors, whose sum is σ = 72124951854882. Its totient is φ = 72124951854880.

The previous prime is 72124951854859. The next prime is 72124951854911. The reversal of 72124951854881 is 18845815942127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63037645140625 + 9087306714256 = 7939625^2 + 3014516^2 .

It is a cyclic number.

It is not a de Polignac number, because 72124951854881 - 2¹⁸ = 72124951592737 is a prime.

It is a super-2 number, since 2×72124951854881² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72124951854581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36062475927440 + 36062475927441.

It is an arithmetic number, because the mean of its divisors is an integer number (36062475927441).

Almost surely, 2^{72124951854881} is an apocalyptic number.

It is an amenable number.

72124951854881 is a deficient number, since it is larger than the sum of its proper divisors (1).

72124951854881 is an equidigital number, since it uses as much as digits as its factorization.

72124951854881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51609600, while the sum is 65.

The spelling of 72124951854881 in words is "seventy-two trillion, one hundred twenty-four billion, nine hundred fifty-one million, eight hundred fifty-four thousand, eight hundred eighty-one".