81195063 has 8 divisors (see below), whose sum is σ = 108406128. Its totient is φ = 54057024.

The previous prime is 81195061. The next prime is 81195073. The reversal of 81195063 is 36059118.

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

It is not a de Polignac number, because 81195063 - 2¹ = 81195061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81195061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15606 + ... + 20147.

It is an arithmetic number, because the mean of its divisors is an integer number (13550766).

Almost surely, 2^81195063 is an apocalyptic number.

81195063 is a deficient number, since it is larger than the sum of its proper divisors (27211065).

81195063 is a wasteful number, since it uses less digits than its factorization.

81195063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36513.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 81195063 is about 9010.8303169020. The cubic root of 81195063 is about 433.0219130655.

The spelling of 81195063 in words is "eighty-one million, one hundred ninety-five thousand, sixty-three".