81461095 has 8 divisors (see below), whose sum is σ = 97801776. Its totient is φ = 65136576.

The previous prime is 81461071. The next prime is 81461141. The reversal of 81461095 is 59016418.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81461095 - 2²¹ = 79363943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81461095.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17539 + ... + 21691.

It is an arithmetic number, because the mean of its divisors is an integer number (12225222).

Almost surely, 2^81461095 is an apocalyptic number.

81461095 is a deficient number, since it is larger than the sum of its proper divisors (16340681).

81461095 is a wasteful number, since it uses less digits than its factorization.

81461095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8081.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 81461095 is about 9025.5800367622. The cubic root of 81461095 is about 433.4943231542.

The spelling of 81461095 in words is "eighty-one million, four hundred sixty-one thousand, ninety-five".