525991269122 has 54 divisors (see below), whose sum is σ = 907026199779. Its totient is φ = 228579033320.

The previous prime is 525991269103. The next prime is 525991269127. The reversal of 525991269122 is 221962199525.

It can be written as a sum of positive squares in only one way, i.e., 262995634561 + 262995634561 = 512831^2 + 512831^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=512831.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525991269127) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 259491473 + ... + 259493499.

Almost surely, 2^525991269122 is an apocalyptic number.

525991269122 is a deficient number, since it is larger than the sum of its proper divisors (381034930657).

525991269122 is an equidigital number, since it uses as much as digits as its factorization.

525991269122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4124 (or 2063 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 53.

The spelling of 525991269122 in words is "five hundred twenty-five billion, nine hundred ninety-one million, two hundred sixty-nine thousand, one hundred twenty-two".