115857522469 has 4 divisors (see below), whose sum is σ = 124769639596. Its totient is φ = 106945405344.

The previous prime is 115857522463. The next prime is 115857522493. The reversal of 115857522469 is 964225758511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 964225758511 = 3719 ⋅259270169.

It can be written as a sum of positive squares in 2 ways, for example, as 63850719969 + 52006802500 = 252687^2 + 228050^2 .

It is a cyclic number.

It is not a de Polignac number, because 115857522469 - 2²¹ = 115855425317 is a prime.

It is a super-2 number, since 2×115857522469² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115857522463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4456058544 + ... + 4456058569.

It is an arithmetic number, because the mean of its divisors is an integer number (31192409899).

Almost surely, 2^115857522469 is an apocalyptic number.

It is an amenable number.

115857522469 is a deficient number, since it is larger than the sum of its proper divisors (8912117127).

115857522469 is an equidigital number, since it uses as much as digits as its factorization.

115857522469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8912117126.

The product of its digits is 6048000, while the sum is 55.

The spelling of 115857522469 in words is "one hundred fifteen billion, eight hundred fifty-seven million, five hundred twenty-two thousand, four hundred sixty-nine".