398636545636893 has 16 divisors (see below), whose sum is σ = 548285435824320. Its totient is φ = 257435959447296.

The previous prime is 398636545636811. The next prime is 398636545636957.

It is a happy number.

398636545636893 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 398636545636893 - 2²⁵ = 398636512082461 is a prime.

It is a super-2 number, since 2×398636545636893² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398636545631893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7910371788 + ... + 7910422181.

It is an arithmetic number, because the mean of its divisors is an integer number (34267839739020).

Almost surely, 2^{398636545636893} is an apocalyptic number.

It is an amenable number.

398636545636893 is a deficient number, since it is larger than the sum of its proper divisors (149648890187427).

398636545636893 is a wasteful number, since it uses less digits than its factorization.

398636545636893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15820794236.

The product of its digits is 54419558400, while the sum is 84.

The spelling of 398636545636893 in words is "three hundred ninety-eight trillion, six hundred thirty-six billion, five hundred forty-five million, six hundred thirty-six thousand, eight hundred ninety-three".