81050648 has 16 divisors (see below), whose sum is σ = 173680080. Its totient is φ = 34735968.

The previous prime is 81050623. The next prime is 81050653. The reversal of 81050648 is 84605018.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723611 + ... + 723722.

It is an arithmetic number, because the mean of its divisors is an integer number (10855005).

Almost surely, 2^81050648 is an apocalyptic number.

It is an amenable number.

81050648 is an abundant number, since it is smaller than the sum of its proper divisors (92629432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81050648 is a wasteful number, since it uses less digits than its factorization.

81050648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447346 (or 1447342 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 81050648 is about 9002.8133380627. The cubic root of 81050648 is about 432.7650338533.

The spelling of 81050648 in words is "eighty-one million, fifty thousand, six hundred forty-eight".