39643432697 has 16 divisors (see below), whose sum is σ = 44266466304. Its totient is φ = 35199738000.

The previous prime is 39643432681. The next prime is 39643432711. The reversal of 39643432697 is 79623434693.

It is a cyclic number.

It is not a de Polignac number, because 39643432697 - 2⁴ = 39643432681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39643432657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153629 + ... + 320762.

It is an arithmetic number, because the mean of its divisors is an integer number (2766654144).

Almost surely, 2^39643432697 is an apocalyptic number.

It is an amenable number.

39643432697 is a deficient number, since it is larger than the sum of its proper divisors (4623033607).

39643432697 is a wasteful number, since it uses less digits than its factorization.

39643432697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474580.

The product of its digits is 17635968, while the sum is 56.

The spelling of 39643432697 in words is "thirty-nine billion, six hundred forty-three million, four hundred thirty-two thousand, six hundred ninety-seven".