81846850 has 12 divisors (see below), whose sum is σ = 152235234. Its totient is φ = 32738720.

The previous prime is 81846847. The next prime is 81846859. The reversal of 81846850 is 5864818.

It can be written as a sum of positive squares in 3 ways, for example, as 70711281 + 11135569 = 8409^2 + 3337^2 .

It is not an unprimeable number, because it can be changed into a prime (81846859) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 818419 + ... + 818518.

Almost surely, 2^81846850 is an apocalyptic number.

81846850 is a deficient number, since it is larger than the sum of its proper divisors (70388384).

81846850 is a wasteful number, since it uses less digits than its factorization.

81846850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636949 (or 1636944 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 81846850 is about 9046.9248919177. The cubic root of 81846850 is about 434.1775095543.

The spelling of 81846850 in words is "eighty-one million, eight hundred forty-six thousand, eight hundred fifty".