81010579 has 8 divisors (see below), whose sum is σ = 87312960. Its totient is φ = 74718336.

The previous prime is 81010541. The next prime is 81010583. The reversal of 81010579 is 97501018.

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 81010579 - 2¹⁵ = 80977811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81010579.

It is not an unprimeable number, because it can be changed into a prime (81010529) 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, 26214 + ... + 29140.

It is an arithmetic number, because the mean of its divisors is an integer number (10914120).

Almost surely, 2^81010579 is an apocalyptic number.

81010579 is a deficient number, since it is larger than the sum of its proper divisors (6302381).

81010579 is a wasteful number, since it uses less digits than its factorization.

81010579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5069.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 81010579 is about 9000.5877030336. The cubic root of 81010579 is about 432.6937067638.

The spelling of 81010579 in words is "eighty-one million, ten thousand, five hundred seventy-nine".