1217393598138 has 16 divisors (see below), whose sum is σ = 2434798007136. Its totient is φ = 405796064240.

The previous prime is 1217393598121. The next prime is 1217393598151. The reversal of 1217393598138 is 8318953937121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2459020 + ... + 2912312.

It is an arithmetic number, because the mean of its divisors is an integer number (152174875446).

Almost surely, 2^{1217393598138} is an apocalyptic number.

1217393598138 is an abundant number, since it is smaller than the sum of its proper divisors (1217404408998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1217393598138 is a wasteful number, since it uses less digits than its factorization.

1217393598138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900909.

The product of its digits is 9797760, while the sum is 60.

The spelling of 1217393598138 in words is "one trillion, two hundred seventeen billion, three hundred ninety-three million, five hundred ninety-eight thousand, one hundred thirty-eight".