39925216987 has 8 divisors (see below), whose sum is σ = 41207918400. Its totient is φ = 38662715784.

The previous prime is 39925216921. The next prime is 39925216999. The reversal of 39925216987 is 78961252993.

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

It is a cyclic number.

It is not a de Polignac number, because 39925216987 - 2¹¹ = 39925214939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39925216087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5046037 + ... + 5053942.

It is an arithmetic number, because the mean of its divisors is an integer number (5150989800).

Almost surely, 2^39925216987 is an apocalyptic number.

39925216987 is a deficient number, since it is larger than the sum of its proper divisors (1282701413).

39925216987 is a wasteful number, since it uses less digits than its factorization.

39925216987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10100105.

The product of its digits is 14696640, while the sum is 61.

The spelling of 39925216987 in words is "thirty-nine billion, nine hundred twenty-five million, two hundred sixteen thousand, nine hundred eighty-seven".