39620706681 has 4 divisors (see below), whose sum is σ = 52827608912. Its totient is φ = 26413804452.

The previous prime is 39620706679. The next prime is 39620706689. The reversal of 39620706681 is 18660702693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 39620706681 - 2¹ = 39620706679 is a prime.

It is a super-3 number, since 3×39620706681³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 39620706681.

It is not an unprimeable number, because it can be changed into a prime (39620706689) 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, 6603451111 + ... + 6603451116.

It is an arithmetic number, because the mean of its divisors is an integer number (13206902228).

Almost surely, 2^39620706681 is an apocalyptic number.

It is an amenable number.

39620706681 is a deficient number, since it is larger than the sum of its proper divisors (13206902231).

39620706681 is a wasteful number, since it uses less digits than its factorization.

39620706681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13206902230.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 39620706681 in words is "thirty-nine billion, six hundred twenty million, seven hundred six thousand, six hundred eighty-one".