39653966397 has 16 divisors (see below), whose sum is σ = 55674371520. Its totient is φ = 25035753600.

The previous prime is 39653966393. The next prime is 39653966449. The reversal of 39653966397 is 79366935693.

It is not a de Polignac number, because 39653966397 - 2² = 39653966393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39653966393) 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 15 ways as a sum of consecutive naturals, for example, 41497 + ... + 284657.

It is an arithmetic number, because the mean of its divisors is an integer number (3479648220).

Almost surely, 2^39653966397 is an apocalyptic number.

It is an amenable number.

39653966397 is a deficient number, since it is larger than the sum of its proper divisors (16020405123).

39653966397 is a wasteful number, since it uses less digits than its factorization.

39653966397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246044.

The product of its digits is 148803480, while the sum is 66.

It can be divided in two parts, 3965396 and 6397, that added together give a palindrome (3971793).

The spelling of 39653966397 in words is "thirty-nine billion, six hundred fifty-three million, nine hundred sixty-six thousand, three hundred ninety-seven".