81595063816786 has 32 divisors (see below), whose sum is σ = 136428798623040. Its totient is φ = 36340317120576.

The previous prime is 81595063816759. The next prime is 81595063816823. The reversal of 81595063816786 is 68761836059518.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28931356 + ... + 31626151.

It is an arithmetic number, because the mean of its divisors is an integer number (4263399956970).

Almost surely, 2^{81595063816786} is an apocalyptic number.

81595063816786 is a deficient number, since it is larger than the sum of its proper divisors (54833734806254).

81595063816786 is a wasteful number, since it uses less digits than its factorization.

81595063816786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60559338.

The product of its (nonzero) digits is 522547200, while the sum is 73.

The spelling of 81595063816786 in words is "eighty-one trillion, five hundred ninety-five billion, sixty-three million, eight hundred sixteen thousand, seven hundred eighty-six".