182721610081 has 4 divisors (see below), whose sum is σ = 184116431664. Its totient is φ = 181326788500.

The previous prime is 182721610037. The next prime is 182721610109. The reversal of 182721610081 is 180016127281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180016127281 = 162691 ⋅1106491.

It is a cyclic number.

It is not a de Polignac number, because 182721610081 - 2⁹ = 182721609569 is a prime.

It is a super-2 number, since 2×182721610081² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 182721610081.

It is not an unprimeable number, because it can be changed into a prime (182721610031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 697410595 + ... + 697410856.

It is an arithmetic number, because the mean of its divisors is an integer number (46029107916).

Almost surely, 2^182721610081 is an apocalyptic number.

It is an amenable number.

182721610081 is a deficient number, since it is larger than the sum of its proper divisors (1394821583).

182721610081 is a wasteful number, since it uses less digits than its factorization.

182721610081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394821582.

The product of its (nonzero) digits is 10752, while the sum is 37.

The spelling of 182721610081 in words is "one hundred eighty-two billion, seven hundred twenty-one million, six hundred ten thousand, eighty-one".