72815511316853 has 2 divisors, whose sum is σ = 72815511316854. Its totient is φ = 72815511316852.

The previous prime is 72815511316729. The next prime is 72815511316879. The reversal of 72815511316853 is 35861311551827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72804972651889 + 10538664964 = 8532583^2 + 102658^2 .

It is a cyclic number.

It is not a de Polignac number, because 72815511316853 - 2⁴⁶ = 2446767139189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72815511316253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36407755658426 + 36407755658427.

It is an arithmetic number, because the mean of its divisors is an integer number (36407755658427).

Almost surely, 2^{72815511316853} is an apocalyptic number.

It is an amenable number.

72815511316853 is a deficient number, since it is larger than the sum of its proper divisors (1).

72815511316853 is an equidigital number, since it uses as much as digits as its factorization.

72815511316853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048000, while the sum is 56.

The spelling of 72815511316853 in words is "seventy-two trillion, eight hundred fifteen billion, five hundred eleven million, three hundred sixteen thousand, eight hundred fifty-three".