15852121200557 has 2 divisors, whose sum is σ = 15852121200558. Its totient is φ = 15852121200556.

The previous prime is 15852121200529. The next prime is 15852121200589. The reversal of 15852121200557 is 75500212125851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15807033349636 + 45087850921 = 3975806^2 + 212339^2 .

It is a cyclic number.

It is not a de Polignac number, because 15852121200557 - 2⁸ = 15852121200301 is a prime.

It is a super-2 number, since 2×15852121200557² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15852121200857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7926060600278 + 7926060600279.

It is an arithmetic number, because the mean of its divisors is an integer number (7926060600279).

Almost surely, 2^{15852121200557} is an apocalyptic number.

It is an amenable number.

15852121200557 is a deficient number, since it is larger than the sum of its proper divisors (1).

15852121200557 is an equidigital number, since it uses as much as digits as its factorization.

15852121200557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280000, while the sum is 44.

The spelling of 15852121200557 in words is "fifteen trillion, eight hundred fifty-two billion, one hundred twenty-one million, two hundred thousand, five hundred fifty-seven".