186993202399681 has 32 divisors (see below), whose sum is σ = 193810539260160. Its totient is φ = 180314216121600.

The previous prime is 186993202399643. The next prime is 186993202399739.

186993202399681 is nontrivially palindromic in base 10.

186993202399681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 186993202399681 - 2¹⁵ = 186993202366913 is a prime.

It is a super-2 number, since 2×186993202399681² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 186993202399598 and 186993202399607.

It is not an unprimeable number, because it can be changed into a prime (186993202399981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7768389876 + ... + 7768413946.

It is an arithmetic number, because the mean of its divisors is an integer number (6056579351880).

Almost surely, 2^{186993202399681} is an apocalyptic number.

It is an amenable number.

186993202399681 is a deficient number, since it is larger than the sum of its proper divisors (6817336860479).

186993202399681 is a wasteful number, since it uses less digits than its factorization.

186993202399681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30025.

The product of its (nonzero) digits is 544195584, while the sum is 76.

The spelling of 186993202399681 in words is "one hundred eighty-six trillion, nine hundred ninety-three billion, two hundred two million, three hundred ninety-nine thousand, six hundred eighty-one".