81901325714 has 16 divisors (see below), whose sum is σ = 140084621208. Its totient is φ = 35577046272.

The previous prime is 81901325713. The next prime is 81901325741. The reversal of 81901325714 is 41752310918.

It can be written as a sum of positive squares in 4 ways, for example, as 63577101025 + 18324224689 = 252145^2 + 135367^2 .

It is not an unprimeable number, because it can be changed into a prime (81901325713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92648117 + ... + 92649000.

Almost surely, 2^81901325714 is an apocalyptic number.

81901325714 is a deficient number, since it is larger than the sum of its proper divisors (58183295494).

81901325714 is a wasteful number, since it uses less digits than its factorization.

81901325714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185297149.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 81901325714 in words is "eighty-one billion, nine hundred one million, three hundred twenty-five thousand, seven hundred fourteen".