81701896077910 has 32 divisors (see below), whose sum is σ = 147423632209920. Its totient is φ = 32600750501088.

The previous prime is 81701896077863. The next prime is 81701896077913. The reversal of 81701896077910 is 1977069810718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81701896077913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13485871 + ... + 18581509.

It is an arithmetic number, because the mean of its divisors is an integer number (4606988506560).

Almost surely, 2^{81701896077910} is an apocalyptic number.

81701896077910 is a deficient number, since it is larger than the sum of its proper divisors (65721736132010).

81701896077910 is a wasteful number, since it uses less digits than its factorization.

81701896077910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5099572.

The product of its (nonzero) digits is 10668672, while the sum is 64.

The spelling of 81701896077910 in words is "eighty-one trillion, seven hundred one billion, eight hundred ninety-six million, seventy-seven thousand, nine hundred ten".