39561304387 has 16 divisors (see below), whose sum is σ = 43253844480. Its totient is φ = 35884876000.

The previous prime is 39561304373. The next prime is 39561304411. The reversal of 39561304387 is 78340316593.

It is a cyclic number.

It is not a de Polignac number, because 39561304387 - 2¹⁵ = 39561271619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39561304387.

It is not an unprimeable number, because it can be changed into a prime (39561304357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16826262 + ... + 16828612.

It is an arithmetic number, because the mean of its divisors is an integer number (2703365280).

Almost surely, 2^39561304387 is an apocalyptic number.

39561304387 is a deficient number, since it is larger than the sum of its proper divisors (3692540093).

39561304387 is a wasteful number, since it uses less digits than its factorization.

39561304387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5114.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 39561304387 in words is "thirty-nine billion, five hundred sixty-one million, three hundred four thousand, three hundred eighty-seven".