39649679069 has 32 divisors (see below), whose sum is σ = 53253123840. Its totient is φ = 28510041600.

The previous prime is 39649679057. The next prime is 39649679129. The reversal of 39649679069 is 96097694693.

It is a cyclic number.

It is not a de Polignac number, because 39649679069 - 2¹² = 39649674973 is a prime.

It is a super-4 number, since 4×39649679069⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39649673069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5262497 + ... + 5270025.

It is an arithmetic number, because the mean of its divisors is an integer number (1664160120).

Almost surely, 2^39649679069 is an apocalyptic number.

It is an amenable number.

39649679069 is a deficient number, since it is larger than the sum of its proper divisors (13603444771).

39649679069 is a wasteful number, since it uses less digits than its factorization.

39649679069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12821.

The product of its (nonzero) digits is 119042784, while the sum is 68.

The spelling of 39649679069 in words is "thirty-nine billion, six hundred forty-nine million, six hundred seventy-nine thousand, sixty-nine".