39926851945 has 8 divisors (see below), whose sum is σ = 47913533640. Its totient is φ = 31940607360.

The previous prime is 39926851907. The next prime is 39926851961. The reversal of 39926851945 is 54915862993.

It can be written as a sum of positive squares in 4 ways, for example, as 16535902464 + 23390949481 = 128592^2 + 152941^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 39926851945 - 2¹⁹ = 39926327657 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 145821 + ... + 317989.

It is an arithmetic number, because the mean of its divisors is an integer number (5989191705).

Almost surely, 2^39926851945 is an apocalyptic number.

It is an amenable number.

39926851945 is a deficient number, since it is larger than the sum of its proper divisors (7986681695).

39926851945 is a wasteful number, since it uses less digits than its factorization.

39926851945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218555.

The product of its digits is 20995200, while the sum is 61.

The spelling of 39926851945 in words is "thirty-nine billion, nine hundred twenty-six million, eight hundred fifty-one thousand, nine hundred forty-five".