39981883669 has 8 divisors (see below), whose sum is σ = 49208472320. Its totient is φ = 31634017776.

The previous prime is 39981883661. The next prime is 39981883699. The reversal of 39981883669 is 96638818993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39981883669 - 2³ = 39981883661 is a prime.

It is a super-2 number, since 2×39981883669² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39981883598 and 39981883607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39981883661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219680589 + ... + 219680770.

It is an arithmetic number, because the mean of its divisors is an integer number (6151059040).

Almost surely, 2^39981883669 is an apocalyptic number.

It is an amenable number.

39981883669 is a deficient number, since it is larger than the sum of its proper divisors (9226588651).

39981883669 is a wasteful number, since it uses less digits than its factorization.

39981883669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439361379.

The product of its digits is 120932352, while the sum is 70.

The spelling of 39981883669 in words is "thirty-nine billion, nine hundred eighty-one million, eight hundred eighty-three thousand, six hundred sixty-nine".