4509373998638 has 4 divisors (see below), whose sum is σ = 6764060997960. Its totient is φ = 2254686999318.

The previous prime is 4509373998523. The next prime is 4509373998643. The reversal of 4509373998638 is 8368993739054.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1127343499658 + ... + 1127343499661.

It is an arithmetic number, because the mean of its divisors is an integer number (1691015249490).

Almost surely, 2^{4509373998638} is an apocalyptic number.

4509373998638 is a deficient number, since it is larger than the sum of its proper divisors (2254686999322).

4509373998638 is a wasteful number, since it uses less digits than its factorization.

4509373998638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254686999321.

The product of its (nonzero) digits is 1058158080, while the sum is 74.

The spelling of 4509373998638 in words is "four trillion, five hundred nine billion, three hundred seventy-three million, nine hundred ninety-eight thousand, six hundred thirty-eight".