80772110728 has 16 divisors (see below), whose sum is σ = 151457005260. Its totient is φ = 40383576000.

The previous prime is 80772110719. The next prime is 80772110753. The reversal of 80772110728 is 82701127708.

It can be written as a sum of positive squares in 2 ways, for example, as 56690657604 + 24081453124 = 238098^2 + 155182^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167623 + ... + 435478.

Almost surely, 2^80772110728 is an apocalyptic number.

It is an amenable number.

80772110728 is a deficient number, since it is larger than the sum of its proper divisors (70684894532).

80772110728 is a wasteful number, since it uses less digits than its factorization.

80772110728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619848 (or 619844 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 43.

The spelling of 80772110728 in words is "eighty billion, seven hundred seventy-two million, one hundred ten thousand, seven hundred twenty-eight".