81461849688088 has 32 divisors (see below), whose sum is σ = 168757284526560. Its totient is φ = 36668249474560.

The previous prime is 81461849688077. The next prime is 81461849688119. The reversal of 81461849688088 is 88088694816418.

It is a junction number, because it is equal to n+sod(n) for n = 81461849687999 and 81461849688017.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13021392283 + ... + 13021398538.

It is an arithmetic number, because the mean of its divisors is an integer number (5273665141455).

Almost surely, 2^{81461849688088} is an apocalyptic number.

It is an amenable number.

81461849688088 is an abundant number, since it is smaller than the sum of its proper divisors (87295434838472).

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

81461849688088 is a wasteful number, since it uses less digits than its factorization.

81461849688088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26042790867 (or 26042790863 counting only the distinct ones).

The product of its (nonzero) digits is 1358954496, while the sum is 79.

The spelling of 81461849688088 in words is "eighty-one trillion, four hundred sixty-one billion, eight hundred forty-nine million, six hundred eighty-eight thousand, eighty-eight".