11638589398 has 16 divisors (see below), whose sum is σ = 18309408480. Its totient is φ = 5538022336.

The previous prime is 11638589383. The next prime is 11638589399. The reversal of 11638589398 is 89398583611.

It is a super-3 number, since 3×11638589398³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11638589399) 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, 633103 + ... + 651226.

It is an arithmetic number, because the mean of its divisors is an integer number (1144338030).

Almost surely, 2^11638589398 is an apocalyptic number.

11638589398 is a deficient number, since it is larger than the sum of its proper divisors (6670819082).

11638589398 is a wasteful number, since it uses less digits than its factorization.

11638589398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284551.

The product of its digits is 11197440, while the sum is 61.

The spelling of 11638589398 in words is "eleven billion, six hundred thirty-eight million, five hundred eighty-nine thousand, three hundred ninety-eight".