40665432243213 has 24 divisors (see below), whose sum is σ = 60999196003200. Its totient is φ = 27072582499008.

The previous prime is 40665432243209. The next prime is 40665432243223. The reversal of 40665432243213 is 31234223456604.

40665432243213 is a `hidden beast` number, since 4 + 0 + 6 + 65 + 43 + 224 + 321 + 3 = 666.

It is not a de Polignac number, because 40665432243213 - 2² = 40665432243209 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40665432243223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116200428 + ... + 116549861.

It is an arithmetic number, because the mean of its divisors is an integer number (2541633166800).

Almost surely, 2^{40665432243213} is an apocalyptic number.

It is an amenable number.

40665432243213 is a deficient number, since it is larger than the sum of its proper divisors (20333763759987).

40665432243213 is an equidigital number, since it uses as much as digits as its factorization.

40665432243213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232751023 (or 232751011 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 45.

Adding to 40665432243213 its reverse (31234223456604), we get a palindrome (71899655699817).

The spelling of 40665432243213 in words is "forty trillion, six hundred sixty-five billion, four hundred thirty-two million, two hundred forty-three thousand, two hundred thirteen".