39649431963 has 4 divisors (see below), whose sum is σ = 52865909288. Its totient is φ = 26432954640.

The previous prime is 39649431947. The next prime is 39649431979. The reversal of 39649431963 is 36913494693.

39649431963 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (39649431947) and next prime (39649431979).

It is not a de Polignac number, because 39649431963 - 2⁴ = 39649431947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39649435963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6608238658 + ... + 6608238663.

It is an arithmetic number, because the mean of its divisors is an integer number (13216477322).

Almost surely, 2^39649431963 is an apocalyptic number.

39649431963 is a deficient number, since it is larger than the sum of its proper divisors (13216477325).

39649431963 is a wasteful number, since it uses less digits than its factorization.

39649431963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13216477324.

The product of its digits is 11337408, while the sum is 57.

The spelling of 39649431963 in words is "thirty-nine billion, six hundred forty-nine million, four hundred thirty-one thousand, nine hundred sixty-three".