39965621627979 has 12 divisors (see below), whose sum is σ = 59136123059832. Its totient is φ = 25993900245600.

The previous prime is 39965621627941. The next prime is 39965621628007. The reversal of 39965621627979 is 97972612656993.

39965621627979 is a `hidden beast` number, since 3 + 9 + 9 + 65 + 6 + 216 + 279 + 79 = 666.

It is not a de Polignac number, because 39965621627979 - 2¹⁷ = 39965621496907 is a prime.

It is a super-2 number, since 2×39965621627979² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39965621627898 and 39965621627907.

It is not an unprimeable number, because it can be changed into a prime (39965621627479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54153958477 + ... + 54153959214.

It is an arithmetic number, because the mean of its divisors is an integer number (4928010254986).

Almost surely, 2^{39965621627979} is an apocalyptic number.

39965621627979 is a deficient number, since it is larger than the sum of its proper divisors (19170501431853).

39965621627979 is a wasteful number, since it uses less digits than its factorization.

39965621627979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108307917738 (or 108307917735 counting only the distinct ones).

The product of its digits is 4166497440, while the sum is 81.

The spelling of 39965621627979 in words is "thirty-nine trillion, nine hundred sixty-five billion, six hundred twenty-one million, six hundred twenty-seven thousand, nine hundred seventy-nine".