81762625796 has 12 divisors (see below), whose sum is σ = 144559694748. Its totient is φ = 40459855872.

The previous prime is 81762625783. The next prime is 81762625801. The reversal of 81762625796 is 69752626718.

It can be written as a sum of positive squares in 2 ways, for example, as 67774832896 + 13987792900 = 260336^2 + 118270^2 .

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, 105363821 + ... + 105364596.

It is an arithmetic number, because the mean of its divisors is an integer number (12046641229).

Almost surely, 2^81762625796 is an apocalyptic number.

It is an amenable number.

81762625796 is a deficient number, since it is larger than the sum of its proper divisors (62797068952).

81762625796 is a wasteful number, since it uses less digits than its factorization.

81762625796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210728518 (or 210728516 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 59.

The spelling of 81762625796 in words is "eighty-one billion, seven hundred sixty-two million, six hundred twenty-five thousand, seven hundred ninety-six".