180220126081 has 4 divisors (see below), whose sum is σ = 180221515200. Its totient is φ = 180218736964.

The previous prime is 180220126069. The next prime is 180220126091. The reversal of 180220126081 is 180621022081.

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.

It is a cyclic number.

It is not a de Polignac number, because 180220126081 - 2²¹ = 180218028929 is a prime.

It is a super-2 number, since 2×180220126081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180220126091) 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, 477301 + ... + 766978.

It is an arithmetic number, because the mean of its divisors is an integer number (45055378800).

Almost surely, 2^180220126081 is an apocalyptic number.

It is an amenable number.

180220126081 is a deficient number, since it is larger than the sum of its proper divisors (1389119).

180220126081 is a wasteful number, since it uses less digits than its factorization.

180220126081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389118.

The product of its (nonzero) digits is 3072, while the sum is 31.

The spelling of 180220126081 in words is "one hundred eighty billion, two hundred twenty million, one hundred twenty-six thousand, eighty-one".