81201708 has 36 divisors (see below), whose sum is σ = 234583440. Its totient is φ = 23200416.

The previous prime is 81201697. The next prime is 81201709. The reversal of 81201708 is 80710218.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (81201709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160863 + ... + 161366.

Almost surely, 2^81201708 is an apocalyptic number.

It is an amenable number.

81201708 is an abundant number, since it is smaller than the sum of its proper divisors (153381732).

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

81201708 is a wasteful number, since it uses less digits than its factorization.

81201708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322246 (or 322241 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 81201708 is about 9011.1990323153. The cubic root of 81201708 is about 433.0337255741.

The spelling of 81201708 in words is "eighty-one million, two hundred one thousand, seven hundred eight".