115521112445 has 4 divisors (see below), whose sum is σ = 138625334940. Its totient is φ = 92416889952.

The previous prime is 115521112439. The next prime is 115521112451. The reversal of 115521112445 is 544211125511.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (115521112439) and next prime (115521112451).

It can be written as a sum of positive squares in 2 ways, for example, as 86188042084 + 29333070361 = 293578^2 + 171269^2 .

It is a cyclic number.

It is not a de Polignac number, because 115521112445 - 2⁶ = 115521112381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11552111240 + ... + 11552111249.

It is an arithmetic number, because the mean of its divisors is an integer number (34656333735).

Almost surely, 2^115521112445 is an apocalyptic number.

It is an amenable number.

115521112445 is a deficient number, since it is larger than the sum of its proper divisors (23104222495).

115521112445 is an equidigital number, since it uses as much as digits as its factorization.

115521112445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23104222494.

The product of its digits is 8000, while the sum is 32.

Adding to 115521112445 its reverse (544211125511), we get a palindrome (659732237956).

The spelling of 115521112445 in words is "one hundred fifteen billion, five hundred twenty-one million, one hundred twelve thousand, four hundred forty-five".