81764150 has 24 divisors (see below), whose sum is σ = 163781184. Its totient is φ = 30189600.

The previous prime is 81764129. The next prime is 81764167. The reversal of 81764150 is 5146718.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62246 + ... + 63545.

It is an arithmetic number, because the mean of its divisors is an integer number (6824216).

Almost surely, 2^81764150 is an apocalyptic number.

81764150 is an abundant number, since it is smaller than the sum of its proper divisors (82017034).

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

81764150 is a wasteful number, since it uses less digits than its factorization.

81764150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125816 (or 125811 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 81764150 is about 9042.3531229432. The cubic root of 81764150 is about 434.0312258533.

The spelling of 81764150 in words is "eighty-one million, seven hundred sixty-four thousand, one hundred fifty".