7874386385 has 16 divisors (see below), whose sum is σ = 9921009600. Its totient is φ = 5991496896.

The previous prime is 7874386381. The next prime is 7874386409. The reversal of 7874386385 is 5836834787.

It is a cyclic number.

It is not a de Polignac number, because 7874386385 - 2² = 7874386381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7874386381) 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, 395555 + ... + 414984.

It is an arithmetic number, because the mean of its divisors is an integer number (620063100).

Almost surely, 2^7874386385 is an apocalyptic number.

It is an amenable number.

7874386385 is a deficient number, since it is larger than the sum of its proper divisors (2046623215).

7874386385 is a wasteful number, since it uses less digits than its factorization.

7874386385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810640.

The product of its digits is 27095040, while the sum is 59.

The square root of 7874386385 is about 88737.7393502900. The cubic root of 7874386385 is about 1989.4769283375.

The spelling of 7874386385 in words is "seven billion, eight hundred seventy-four million, three hundred eighty-six thousand, three hundred eighty-five".