39919966465 has 8 divisors (see below), whose sum is σ = 48618944640. Its totient is φ = 31459316592.

The previous prime is 39919966453. The next prime is 39919966469. The reversal of 39919966465 is 56466991993.

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 39919966465 - 2¹⁷ = 39919835393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a self number, because there is not a number n which added to its sum of digits gives 39919966465.

It is not an unprimeable number, because it can be changed into a prime (39919966469) 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, 59581705 + ... + 59582374.

It is an arithmetic number, because the mean of its divisors is an integer number (6077368080).

Almost surely, 2^39919966465 is an apocalyptic number.

It is an amenable number.

39919966465 is a deficient number, since it is larger than the sum of its proper divisors (8698978175).

39919966465 is a wasteful number, since it uses less digits than its factorization.

39919966465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119164151.

The product of its digits is 85030560, while the sum is 67.

The spelling of 39919966465 in words is "thirty-nine billion, nine hundred nineteen million, nine hundred sixty-six thousand, four hundred sixty-five".