39640891730 has 32 divisors (see below), whose sum is σ = 77863984128. Its totient is φ = 14410483200.

The previous prime is 39640891721. The next prime is 39640891751. The reversal of 39640891730 is 3719804693.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319874 + ... + 426146.

It is an arithmetic number, because the mean of its divisors is an integer number (2433249504).

Almost surely, 2^39640891730 is an apocalyptic number.

39640891730 is a deficient number, since it is larger than the sum of its proper divisors (38223092398).

39640891730 is a wasteful number, since it uses less digits than its factorization.

39640891730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109682.

The product of its (nonzero) digits is 979776, while the sum is 50.

The spelling of 39640891730 in words is "thirty-nine billion, six hundred forty million, eight hundred ninety-one thousand, seven hundred thirty".