39945266426 has 32 divisors (see below), whose sum is σ = 65858244480. Its totient is φ = 18058176576.

The previous prime is 39945266423. The next prime is 39945266441. The reversal of 39945266426 is 62466254993.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (39945266423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377915 + ... + 471921.

It is an arithmetic number, because the mean of its divisors is an integer number (2058070140).

Almost surely, 2^39945266426 is an apocalyptic number.

39945266426 is a deficient number, since it is larger than the sum of its proper divisors (25912978054).

39945266426 is a wasteful number, since it uses less digits than its factorization.

39945266426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94358.

The product of its digits is 16796160, while the sum is 56.

The spelling of 39945266426 in words is "thirty-nine billion, nine hundred forty-five million, two hundred sixty-six thousand, four hundred twenty-six".