39145959644 has 24 divisors (see below), whose sum is σ = 75633602688. Its totient is φ = 17579235440.

The previous prime is 39145959641. The next prime is 39145959661. The reversal of 39145959644 is 44695954193.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39145959641) 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 7 ways as a sum of consecutive naturals, for example, 5355872 + ... + 5363175.

It is an arithmetic number, because the mean of its divisors is an integer number (3151400112).

Almost surely, 2^39145959644 is an apocalyptic number.

It is an amenable number.

39145959644 is a deficient number, since it is larger than the sum of its proper divisors (36487643044).

39145959644 is a wasteful number, since it uses less digits than its factorization.

39145959644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10719145 (or 10719143 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 59.

The spelling of 39145959644 in words is "thirty-nine billion, one hundred forty-five million, nine hundred fifty-nine thousand, six hundred forty-four".