8157122653 has 2 divisors, whose sum is σ = 8157122654. Its totient is φ = 8157122652.

The previous prime is 8157122641. The next prime is 8157122671. The reversal of 8157122653 is 3562217518.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7568478009 + 588644644 = 86997^2 + 24262^2 .

It is a cyclic number.

It is not a de Polignac number, because 8157122653 - 2²⁹ = 7620251741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8157122353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4078561326 + 4078561327.

It is an arithmetic number, because the mean of its divisors is an integer number (4078561327).

Almost surely, 2^8157122653 is an apocalyptic number.

It is an amenable number.

8157122653 is a deficient number, since it is larger than the sum of its proper divisors (1).

8157122653 is an equidigital number, since it uses as much as digits as its factorization.

8157122653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 40.

The square root of 8157122653 is about 90316.7905375296. The cubic root of 8157122653 is about 2013.0087570827.

The spelling of 8157122653 in words is "eight billion, one hundred fifty-seven million, one hundred twenty-two thousand, six hundred fifty-three".