81735850 has 48 divisors (see below), whose sum is σ = 174506688. Its totient is φ = 27901440.

The previous prime is 81735817. The next prime is 81735877. The reversal of 81735850 is 5853718.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121114 + ... + 121786.

It is an arithmetic number, because the mean of its divisors is an integer number (3635556).

Almost surely, 2^81735850 is an apocalyptic number.

81735850 is an abundant number, since it is smaller than the sum of its proper divisors (92770838).

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

81735850 is a wasteful number, since it uses less digits than its factorization.

81735850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039 (or 1034 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 81735850 is about 9040.7881293613. The cubic root of 81735850 is about 433.9811448129.

The spelling of 81735850 in words is "eighty-one million, seven hundred thirty-five thousand, eight hundred fifty".