81895146 has 8 divisors (see below), whose sum is σ = 163790304. Its totient is φ = 27298380.

The previous prime is 81895141. The next prime is 81895147. The reversal of 81895146 is 64159818.

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

81895146 is an admirable number.

It is a super-2 number, since 2×81895146² = 13413629876722632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81895098 and 81895107.

It is not an unprimeable number, because it can be changed into a prime (81895141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6824590 + ... + 6824601.

It is an arithmetic number, because the mean of its divisors is an integer number (20473788).

Almost surely, 2^81895146 is an apocalyptic number.

81895146 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81895146 is a wasteful number, since it uses less digits than its factorization.

81895146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13649196.

The product of its digits is 69120, while the sum is 42.

The square root of 81895146 is about 9049.5936925367. The cubic root of 81895146 is about 434.2628922494.

The spelling of 81895146 in words is "eighty-one million, eight hundred ninety-five thousand, one hundred forty-six".