8081049091725 has 144 divisors (see below), whose sum is σ = 15393880300032. Its totient is φ = 4038289274880.

The previous prime is 8081049091723. The next prime is 8081049091763. The reversal of 8081049091725 is 5271909401808.

It is a happy number.

8081049091725 is a `hidden beast` number, since 8 + 0 + 81 + 0 + 490 + 9 + 1 + 72 + 5 = 666.

It is not a de Polignac number, because 8081049091725 - 2¹ = 8081049091723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8081049091723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1634844604 + ... + 1634849546.

It is an arithmetic number, because the mean of its divisors is an integer number (106901946528).

Almost surely, 2^{8081049091725} is an apocalyptic number.

8081049091725 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8081049091725 is a deficient number, since it is larger than the sum of its proper divisors (7312831208307).

8081049091725 is a wasteful number, since it uses less digits than its factorization.

8081049091725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6796 (or 6788 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The spelling of 8081049091725 in words is "eight trillion, eighty-one billion, forty-nine million, ninety-one thousand, seven hundred twenty-five".