81259982601 has 8 divisors (see below), whose sum is σ = 123824735424. Its totient is φ = 46434275760.

The previous prime is 81259982597. The next prime is 81259982623. The reversal of 81259982601 is 10628995218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81259982601 - 2² = 81259982597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81259984601) 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, 1934761470 + ... + 1934761511.

It is an arithmetic number, because the mean of its divisors is an integer number (15478091928).

Almost surely, 2^81259982601 is an apocalyptic number.

It is an amenable number.

81259982601 is a deficient number, since it is larger than the sum of its proper divisors (42564752823).

81259982601 is a wasteful number, since it uses less digits than its factorization.

81259982601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3869522991.

The product of its (nonzero) digits is 622080, while the sum is 51.

The spelling of 81259982601 in words is "eighty-one billion, two hundred fifty-nine million, nine hundred eighty-two thousand, six hundred one".