81050763 has 8 divisors (see below), whose sum is σ = 108420928. Its totient is φ = 53857224.

The previous prime is 81050699. The next prime is 81050777. The reversal of 81050763 is 36705018.

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

It is not a de Polignac number, because 81050763 - 2⁶ = 81050699 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 81050763.

It is not an unprimeable number, because it can be changed into a prime (81150763) 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, 43081 + ... + 44922.

It is an arithmetic number, because the mean of its divisors is an integer number (13552616).

Almost surely, 2^81050763 is an apocalyptic number.

81050763 is a deficient number, since it is larger than the sum of its proper divisors (27370165).

81050763 is a wasteful number, since it uses less digits than its factorization.

81050763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88313.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 81050763 is about 9002.8197249528. The cubic root of 81050763 is about 432.7652385317.

The spelling of 81050763 in words is "eighty-one million, fifty thousand, seven hundred sixty-three".