81264055 has 8 divisors (see below), whose sum is σ = 98692272. Its totient is φ = 64227648.

The previous prime is 81264019. The next prime is 81264059. The reversal of 81264055 is 55046218.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81264055 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81264059) 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, 97494 + ... + 98323.

It is an arithmetic number, because the mean of its divisors is an integer number (12336534).

Almost surely, 2^81264055 is an apocalyptic number.

81264055 is a deficient number, since it is larger than the sum of its proper divisors (17428217).

81264055 is a wasteful number, since it uses less digits than its factorization.

81264055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195905.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 81264055 is about 9014.6577860726. The cubic root of 81264055 is about 433.1445255703.

The spelling of 81264055 in words is "eighty-one million, two hundred sixty-four thousand, fifty-five".