39996861559 has 4 divisors (see below), whose sum is σ = 40011683400. Its totient is φ = 39982039720.

The previous prime is 39996861557. The next prime is 39996861577. The reversal of 39996861559 is 95516869993.

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

It is a cyclic number.

It is not a de Polignac number, because 39996861559 - 2¹ = 39996861557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39996861557) 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, 7406872 + ... + 7412269.

It is an arithmetic number, because the mean of its divisors is an integer number (10002920850).

Almost surely, 2^39996861559 is an apocalyptic number.

39996861559 is a deficient number, since it is larger than the sum of its proper divisors (14821841).

39996861559 is a wasteful number, since it uses less digits than its factorization.

39996861559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14821840.

The product of its digits is 141717600, while the sum is 70.

The spelling of 39996861559 in words is "thirty-nine billion, nine hundred ninety-six million, eight hundred sixty-one thousand, five hundred fifty-nine".