81175264 has 12 divisors (see below), whose sum is σ = 159813864. Its totient is φ = 40587616.

The previous prime is 81175261. The next prime is 81175273. The reversal of 81175264 is 46257118.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81175261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1268332 + ... + 1268395.

It is an arithmetic number, because the mean of its divisors is an integer number (13317822).

Almost surely, 2^81175264 is an apocalyptic number.

It is an amenable number.

81175264 is a deficient number, since it is larger than the sum of its proper divisors (78638600).

81175264 is a wasteful number, since it uses less digits than its factorization.

81175264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536737 (or 2536729 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 81175264 is about 9009.7316275237. The cubic root of 81175264 is about 432.9867134795.

The spelling of 81175264 in words is "eighty-one million, one hundred seventy-five thousand, two hundred sixty-four".