39431616540 has 24 divisors (see below), whose sum is σ = 110408526480. Its totient is φ = 10515097728.

The previous prime is 39431616527. The next prime is 39431616547. The reversal of 39431616540 is 4561613493.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 39431616492 and 39431616501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39431616547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328596745 + ... + 328596864.

It is an arithmetic number, because the mean of its divisors is an integer number (4600355270).

Almost surely, 2^39431616540 is an apocalyptic number.

39431616540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39431616540 is an abundant number, since it is smaller than the sum of its proper divisors (70976909940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39431616540 is a wasteful number, since it uses less digits than its factorization.

39431616540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657193621 (or 657193619 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 39431616540 in words is "thirty-nine billion, four hundred thirty-one million, six hundred sixteen thousand, five hundred forty".