81982725410901 has 16 divisors (see below), whose sum is σ = 124966239939200. Its totient is φ = 46832203349568.

The previous prime is 81982725410843. The next prime is 81982725410921. The reversal of 81982725410901 is 10901452728918.

It is a happy number.

It is not a de Polignac number, because 81982725410901 - 2⁴³ = 73186632388693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81982725410921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 627779566 + ... + 627910143.

It is an arithmetic number, because the mean of its divisors is an integer number (7810389996200).

Almost surely, 2^{81982725410901} is an apocalyptic number.

It is an amenable number.

81982725410901 is a deficient number, since it is larger than the sum of its proper divisors (42983514528299).

81982725410901 is a wasteful number, since it uses less digits than its factorization.

81982725410901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255692828.

The product of its (nonzero) digits is 2903040, while the sum is 57.

The spelling of 81982725410901 in words is "eighty-one trillion, nine hundred eighty-two billion, seven hundred twenty-five million, four hundred ten thousand, nine hundred one".