81695465 has 8 divisors (see below), whose sum is σ = 101415240. Its totient is φ = 63102592.

The previous prime is 81695461. The next prime is 81695473. The reversal of 81695465 is 56459618.

It can be written as a sum of positive squares in 4 ways, for example, as 929296 + 80766169 = 964^2 + 8987^2 .

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 81695465 - 2² = 81695461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81695461) 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, 281564 + ... + 281853.

It is an arithmetic number, because the mean of its divisors is an integer number (12676905).

Almost surely, 2^81695465 is an apocalyptic number.

It is an amenable number.

81695465 is a deficient number, since it is larger than the sum of its proper divisors (19719775).

81695465 is a wasteful number, since it uses less digits than its factorization.

81695465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563451.

The product of its digits is 259200, while the sum is 44.

The square root of 81695465 is about 9038.5543644988. The cubic root of 81695465 is about 433.9096575529.

The spelling of 81695465 in words is "eighty-one million, six hundred ninety-five thousand, four hundred sixty-five".