8081169525 has 360 divisors, whose sum is σ = 18438715680. Its totient is φ = 3472761600.

The previous prime is 8081169511. The next prime is 8081169533. The reversal of 8081169525 is 5259611808.

It is a happy number.

8081169525 is a `hidden beast` number, since 8 + 0 + 8 + 116 + 9 + 525 = 666.

It is not a de Polignac number, because 8081169525 - 2⁹ = 8081169013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

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 359 ways as a sum of consecutive naturals, for example, 136968946 + ... + 136969004.

Almost surely, 2^8081169525 is an apocalyptic number.

It is an amenable number.

8081169525 is an abundant number, since it is smaller than the sum of its proper divisors (10357546155).

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

8081169525 is a wasteful number, since it uses less digits than its factorization.

8081169525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 45.

The square root of 8081169525 is about 89895.3253790207. The cubic root of 8081169525 is about 2006.7413784607.

The spelling of 8081169525 in words is "eight billion, eighty-one million, one hundred sixty-nine thousand, five hundred twenty-five".