8157833557 has 2 divisors, whose sum is σ = 8157833558. Its totient is φ = 8157833556.

The previous prime is 8157833549. The next prime is 8157833587. The reversal of 8157833557 is 7553387518.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5877675556 + 2280158001 = 76666^2 + 47751^2 .

It is a cyclic number.

It is not a de Polignac number, because 8157833557 - 2³ = 8157833549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8157833507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4078916778 + 4078916779.

It is an arithmetic number, because the mean of its divisors is an integer number (4078916779).

Almost surely, 2^8157833557 is an apocalyptic number.

It is an amenable number.

8157833557 is a deficient number, since it is larger than the sum of its proper divisors (1).

8157833557 is an equidigital number, since it uses as much as digits as its factorization.

8157833557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528000, while the sum is 52.

The square root of 8157833557 is about 90320.7260655050. The cubic root of 8157833557 is about 2013.0672341735.

The spelling of 8157833557 in words is "eight billion, one hundred fifty-seven million, eight hundred thirty-three thousand, five hundred fifty-seven".