4181940138765 has 64 divisors (see below), whose sum is σ = 6823361617920. Its totient is φ = 2186500592640.

The previous prime is 4181940138763. The next prime is 4181940138851. The reversal of 4181940138765 is 5678310491814.

It is not a de Polignac number, because 4181940138765 - 2¹ = 4181940138763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4181940138763) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 521630037 + ... + 521638053.

It is an arithmetic number, because the mean of its divisors is an integer number (106615025280).

Almost surely, 2^{4181940138765} is an apocalyptic number.

It is an amenable number.

4181940138765 is a deficient number, since it is larger than the sum of its proper divisors (2641421479155).

4181940138765 is a wasteful number, since it uses less digits than its factorization.

4181940138765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9642.

The product of its (nonzero) digits is 5806080, while the sum is 57.

The spelling of 4181940138765 in words is "four trillion, one hundred eighty-one billion, nine hundred forty million, one hundred thirty-eight thousand, seven hundred sixty-five".