115966720890 has 24 divisors (see below), whose sum is σ = 301513474548. Its totient is φ = 30924458880.

The previous prime is 115966720867. The next prime is 115966720907. The reversal of 115966720890 is 98027669511.

It can be written as a sum of positive squares in 2 ways, for example, as 110264507721 + 5702213169 = 332061^2 + 75513^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 644259471 + ... + 644259650.

Almost surely, 2^115966720890 is an apocalyptic number.

115966720890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115966720890 is an abundant number, since it is smaller than the sum of its proper divisors (185546753658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115966720890 is a wasteful number, since it uses less digits than its factorization.

115966720890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288519134 (or 1288519131 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 115966720890 in words is "one hundred fifteen billion, nine hundred sixty-six million, seven hundred twenty thousand, eight hundred ninety".