7642687418 has 16 divisors (see below), whose sum is σ = 11492517120. Its totient is φ = 3811860000.

The previous prime is 7642687417. The next prime is 7642687421. The reversal of 7642687418 is 8147862467.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7642687418.

It is not an unprimeable number, because it can be changed into a prime (7642687417) 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, 2343473 + ... + 2346731.

It is an arithmetic number, because the mean of its divisors is an integer number (718282320).

Almost surely, 2^7642687418 is an apocalyptic number.

7642687418 is a deficient number, since it is larger than the sum of its proper divisors (3849829702).

7642687418 is a wasteful number, since it uses less digits than its factorization.

7642687418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5813.

The product of its digits is 3612672, while the sum is 53.

The square root of 7642687418 is about 87422.4651791517. The cubic root of 7642687418 is about 1969.7693063881.

The spelling of 7642687418 in words is "seven billion, six hundred forty-two million, six hundred eighty-seven thousand, four hundred eighteen".