39519966697 has 8 divisors (see below), whose sum is σ = 40775322240. Its totient is φ = 38283488880.

The previous prime is 39519966677. The next prime is 39519966709. The reversal of 39519966697 is 79666991593.

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 39519966697 - 2²³ = 39511578089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39519966677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4715179 + ... + 4723552.

It is an arithmetic number, because the mean of its divisors is an integer number (5096915280).

Almost surely, 2^39519966697 is an apocalyptic number.

It is an amenable number.

39519966697 is a deficient number, since it is larger than the sum of its proper divisors (1255355543).

39519966697 is an equidigital number, since it uses as much as digits as its factorization.

39519966697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9438863.

The product of its digits is 148803480, while the sum is 70.

The spelling of 39519966697 in words is "thirty-nine billion, five hundred nineteen million, nine hundred sixty-six thousand, six hundred ninety-seven".