115638763249 has 3 divisors (see below), whose sum is σ = 115639103307. Its totient is φ = 115638423192.

The previous prime is 115638763193. The next prime is 115638763267. The reversal of 115638763249 is 942367836511.

It is a happy number.

The square root of 115638763249 is 340057.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 104649015025 + 10989748224 = 323495^2 + 104832^2 .

It is a de Polignac number, because none of the positive numbers 2^k-115638763249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115638763249.

It is not an unprimeable number, because it can be changed into a prime (115638763649) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 170029 + ... + 510085.

It is an arithmetic number, because the mean of its divisors is an integer number (38546367769).

Almost surely, 2^115638763249 is an apocalyptic number.

115638763249 is the 340057-th square number.

115638763249 is the 170029-th centered octagonal number.

It is an amenable number.

115638763249 is a deficient number, since it is larger than the sum of its proper divisors (340058).

115638763249 is an frugal number, since it uses more digits than its factorization.

115638763249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680114 (or 340057 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 55.

The spelling of 115638763249 in words is "one hundred fifteen billion, six hundred thirty-eight million, seven hundred sixty-three thousand, two hundred forty-nine".