80729498900 has 72 divisors (see below), whose sum is σ = 176005156824. Its totient is φ = 32140556800.

The previous prime is 80729498881. The next prime is 80729498909. The reversal of 80729498900 is 989492708.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 689167504 + 80040331396 = 26252^2 + 282914^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80729498909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34602134 + ... + 34604466.

It is an arithmetic number, because the mean of its divisors is an integer number (2444516067).

Almost surely, 2^80729498900 is an apocalyptic number.

It is an amenable number.

80729498900 is an abundant number, since it is smaller than the sum of its proper divisors (95275657924).

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

80729498900 is a wasteful number, since it uses less digits than its factorization.

80729498900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821 (or 3814 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 56.

The spelling of 80729498900 in words is "eighty billion, seven hundred twenty-nine million, four hundred ninety-eight thousand, nine hundred".