81029249160732 has 72 divisors (see below), whose sum is σ = 206449684786800. Its totient is φ = 26795614940928.

The previous prime is 81029249160719. The next prime is 81029249160787. The reversal of 81029249160732 is 23706194292018.

81029249160732 is a `hidden beast` number, since 8 + 1 + 0 + 2 + 9 + 24 + 9 + 1 + 607 + 3 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2585194 + ... + 12990062.

It is an arithmetic number, because the mean of its divisors is an integer number (2867356733150).

Almost surely, 2^{81029249160732} is an apocalyptic number.

It is an amenable number.

81029249160732 is an abundant number, since it is smaller than the sum of its proper divisors (125420435626068).

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

81029249160732 is a wasteful number, since it uses less digits than its factorization.

81029249160732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10406595 (or 10406590 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 81029249160732 in words is "eighty-one trillion, twenty-nine billion, two hundred forty-nine million, one hundred sixty thousand, seven hundred thirty-two".