3989613794787 has 16 divisors (see below), whose sum is σ = 6010717584000. Its totient is φ = 2614662146952.

The previous prime is 3989613794773. The next prime is 3989613794807. The reversal of 3989613794787 is 7874973169893.

3989613794787 is a `hidden beast` number, since 3 + 9 + 8 + 9 + 6 + 137 + 9 + 478 + 7 = 666.

It is not a de Polignac number, because 3989613794787 - 2¹² = 3989613790691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3989613794687) 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, 1252231237 + ... + 1252234422.

It is an arithmetic number, because the mean of its divisors is an integer number (375669849000).

Almost surely, 2^{3989613794787} is an apocalyptic number.

3989613794787 is a deficient number, since it is larger than the sum of its proper divisors (2021103789213).

3989613794787 is a wasteful number, since it uses less digits than its factorization.

3989613794787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504465727 (or 2504465721 counting only the distinct ones).

The product of its digits is 3456649728, while the sum is 81.

The spelling of 3989613794787 in words is "three trillion, nine hundred eighty-nine billion, six hundred thirteen million, seven hundred ninety-four thousand, seven hundred eighty-seven".