115210089621 has 72 divisors (see below), whose sum is σ = 185650821720. Its totient is φ = 68787164160.

The previous prime is 115210089607. The next prime is 115210089653. The reversal of 115210089621 is 126980012511.

115210089621 is a `hidden beast` number, since 1 + 1 + 5 + 21 + 0 + 0 + 8 + 9 + 621 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 27334008900 + 87876080721 = 165330^2 + 296439^2 .

It is not a de Polignac number, because 115210089621 - 2¹³ = 115210081429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115210089661) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 28395825 + ... + 28399881.

It is an arithmetic number, because the mean of its divisors is an integer number (2578483635).

Almost surely, 2^115210089621 is an apocalyptic number.

115210089621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

115210089621 is a deficient number, since it is larger than the sum of its proper divisors (70440732099).

115210089621 is a wasteful number, since it uses less digits than its factorization.

115210089621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4467 (or 4453 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 36.

The spelling of 115210089621 in words is "one hundred fifteen billion, two hundred ten million, eighty-nine thousand, six hundred twenty-one".