39396407891797 has 16 divisors (see below), whose sum is σ = 45522281437632. Its totient is φ = 33696104497920.

The previous prime is 39396407891791. The next prime is 39396407891803. The reversal of 39396407891797 is 79719870469393.

It is an interprime number because it is at equal distance from previous prime (39396407891791) and next prime (39396407891803).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39396407891797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39396407891797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39396407891791) 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, 37138023 + ... + 38184100.

It is an arithmetic number, because the mean of its divisors is an integer number (2845142589852).

Almost surely, 2^{39396407891797} is an apocalyptic number.

It is an amenable number.

39396407891797 is a deficient number, since it is larger than the sum of its proper divisors (6125873545835).

39396407891797 is a wasteful number, since it uses less digits than its factorization.

39396407891797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75324948.

The product of its (nonzero) digits is 3888730944, while the sum is 82.

It can be divided in two parts, 39396407 and 891797, that added together give a palindrome (40288204).

The spelling of 39396407891797 in words is "thirty-nine trillion, three hundred ninety-six billion, four hundred seven million, eight hundred ninety-one thousand, seven hundred ninety-seven".