81264675 has 24 divisors (see below), whose sum is σ = 142263216. Its totient is φ = 40791040.

The previous prime is 81264649. The next prime is 81264679. The reversal of 81264675 is 57646218.

It is not a de Polignac number, because 81264675 - 2⁹ = 81264163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81264679) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30594 + ... + 33143.

It is an arithmetic number, because the mean of its divisors is an integer number (5927634).

Almost surely, 2^81264675 is an apocalyptic number.

81264675 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

81264675 is a deficient number, since it is larger than the sum of its proper divisors (60998541).

81264675 is a wasteful number, since it uses less digits than its factorization.

81264675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63767 (or 63762 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 81264675 is about 9014.6921744450. The cubic root of 81264675 is about 433.1456271189.

The spelling of 81264675 in words is "eighty-one million, two hundred sixty-four thousand, six hundred seventy-five".