81529196760 has 128 divisors (see below), whose sum is σ = 296469849600. Its totient is φ = 19764650880.

The previous prime is 81529196747. The next prime is 81529196797. The reversal of 81529196760 is 6769192518.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 81529196697 and 81529196706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3419484 + ... + 3443243.

It is an arithmetic number, because the mean of its divisors is an integer number (2316170700).

Almost surely, 2^81529196760 is an apocalyptic number.

It is an amenable number.

81529196760 is an abundant number, since it is smaller than the sum of its proper divisors (214940652840).

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

81529196760 is a wasteful number, since it uses less digits than its factorization.

81529196760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6862758 (or 6862748 counting only the distinct ones).

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

The spelling of 81529196760 in words is "eighty-one billion, five hundred twenty-nine million, one hundred ninety-six thousand, seven hundred sixty".