7642788458 has 8 divisors (see below), whose sum is σ = 11464709220. Its totient is φ = 3821218720.

The previous prime is 7642788451. The next prime is 7642788463. The reversal of 7642788458 is 8548872467.

It can be written as a sum of positive squares in 2 ways, for example, as 6807405049 + 835383409 = 82507^2 + 28903^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 7642788397 and 7642788406.

It is not an unprimeable number, because it can be changed into a prime (7642788451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24083 + ... + 125958.

Almost surely, 2^7642788458 is an apocalyptic number.

7642788458 is a deficient number, since it is larger than the sum of its proper divisors (3821920762).

7642788458 is a wasteful number, since it uses less digits than its factorization.

7642788458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175512.

The product of its digits is 24084480, while the sum is 59.

The square root of 7642788458 is about 87423.0430607400. The cubic root of 7642788458 is about 1969.7779867821. Note that the first 3 decimals are identical.

The spelling of 7642788458 in words is "seven billion, six hundred forty-two million, seven hundred eighty-eight thousand, four hundred fifty-eight".