39456563966 has 16 divisors (see below), whose sum is σ = 61337461248. Its totient is φ = 19015815000.

The previous prime is 39456563953. The next prime is 39456563969. The reversal of 39456563966 is 66936565493.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 39456563899 and 39456563908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39456563969) 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, 1252160 + ... + 1283283.

It is an arithmetic number, because the mean of its divisors is an integer number (3833591328).

Almost surely, 2^39456563966 is an apocalyptic number.

39456563966 is a deficient number, since it is larger than the sum of its proper divisors (21880897282).

39456563966 is a wasteful number, since it uses less digits than its factorization.

39456563966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535727.

The product of its digits is 94478400, while the sum is 62.

The spelling of 39456563966 in words is "thirty-nine billion, four hundred fifty-six million, five hundred sixty-three thousand, nine hundred sixty-six".