180001999980036 has 36 divisors (see below), whose sum is σ = 490005444391372. Its totient is φ = 55385230762944.

The previous prime is 180001999980031. The next prime is 180001999980113. The reversal of 180001999980036 is 630089999100081.

It can be written as a sum of positive squares in 2 ways, for example, as 16575434834436 + 163426565145600 = 4071294^2 + 12783840^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×180001999980036² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (180001999980031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 192309828571 + ... + 192309829506.

Almost surely, 2^{180001999980036} is an apocalyptic number.

It is an amenable number.

180001999980036 is an abundant number, since it is smaller than the sum of its proper divisors (310003444411336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

180001999980036 is a wasteful number, since it uses less digits than its factorization.

180001999980036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384619658100 (or 384619658095 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 63.

The spelling of 180001999980036 in words is "one hundred eighty trillion, one billion, nine hundred ninety-nine million, nine hundred eighty thousand, thirty-six".