798158000638 has 4 divisors (see below), whose sum is σ = 1197237000960. Its totient is φ = 399079000318.

The previous prime is 798158000609. The next prime is 798158000663. The reversal of 798158000638 is 836000851897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836000851897 = 181 ⋅4618789237.

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, 199539500158 + ... + 199539500161.

It is an arithmetic number, because the mean of its divisors is an integer number (299309250240).

Almost surely, 2^798158000638 is an apocalyptic number.

798158000638 is a deficient number, since it is larger than the sum of its proper divisors (399079000322).

798158000638 is a wasteful number, since it uses less digits than its factorization.

798158000638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399079000321.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 798158000638 in words is "seven hundred ninety-eight billion, one hundred fifty-eight million, six hundred thirty-eight", and thus it is an aban number.