81346461 has 16 divisors (see below), whose sum is σ = 127307904. Its totient is φ = 45226944.

The previous prime is 81346403. The next prime is 81346471. The reversal of 81346461 is 16464318.

It is not a de Polignac number, because 81346461 - 2¹¹ = 81344413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81346471) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 51570 + ... + 53123.

It is an arithmetic number, because the mean of its divisors is an integer number (7956744).

Almost surely, 2^81346461 is an apocalyptic number.

It is an amenable number.

81346461 is a deficient number, since it is larger than the sum of its proper divisors (45961443).

81346461 is a wasteful number, since it uses less digits than its factorization.

81346461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104740.

The product of its digits is 13824, while the sum is 33.

The square root of 81346461 is about 9019.2272950625. The cubic root of 81346461 is about 433.2908865063.

It can be divided in two parts, 813 and 46461, that added together give a palindrome (47274).

The spelling of 81346461 in words is "eighty-one million, three hundred forty-six thousand, four hundred sixty-one".