39969429661 has 8 divisors (see below), whose sum is σ = 45684385344. Its totient is φ = 34255733280.

The previous prime is 39969429649. The next prime is 39969429677. The reversal of 39969429661 is 16692496993.

39969429661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 39969429661 - 2¹¹ = 39969427613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39969429593 and 39969429602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39969429061) 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, 245800 + ... + 374641.

It is an arithmetic number, because the mean of its divisors is an integer number (5710548168).

Almost surely, 2^39969429661 is an apocalyptic number.

It is an amenable number.

39969429661 is a deficient number, since it is larger than the sum of its proper divisors (5714955683).

39969429661 is an equidigital number, since it uses as much as digits as its factorization.

39969429661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629651.

The product of its digits is 34012224, while the sum is 64.

The spelling of 39969429661 in words is "thirty-nine billion, nine hundred sixty-nine million, four hundred twenty-nine thousand, six hundred sixty-one".