72723016570381 has 2 divisors, whose sum is σ = 72723016570382. Its totient is φ = 72723016570380.

The previous prime is 72723016570289. The next prime is 72723016570403. The reversal of 72723016570381 is 18307561032727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52196145596100 + 20526870974281 = 7224690^2 + 4530659^2 .

It is a cyclic number.

It is not a de Polignac number, because 72723016570381 - 2⁴¹ = 70523993314829 is a prime.

It is a super-2 number, since 2×72723016570381² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72723016570181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36361508285190 + 36361508285191.

It is an arithmetic number, because the mean of its divisors is an integer number (36361508285191).

Almost surely, 2^{72723016570381} is an apocalyptic number.

It is an amenable number.

72723016570381 is a deficient number, since it is larger than the sum of its proper divisors (1).

72723016570381 is an equidigital number, since it uses as much as digits as its factorization.

72723016570381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 72723016570381 in words is "seventy-two trillion, seven hundred twenty-three billion, sixteen million, five hundred seventy thousand, three hundred eighty-one".