398654907863 has 16 divisors (see below), whose sum is σ = 417258495936. Its totient is φ = 380158986240.

The previous prime is 398654907841. The next prime is 398654907881. The reversal of 398654907863 is 368709456893.

It is a cyclic number.

It is not a de Polignac number, because 398654907863 - 2⁶ = 398654907799 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398654907793 and 398654907802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398654907823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10239053 + ... + 10277913.

It is an arithmetic number, because the mean of its divisors is an integer number (26078655996).

Almost surely, 2^398654907863 is an apocalyptic number.

398654907863 is a deficient number, since it is larger than the sum of its proper divisors (18603588073).

398654907863 is a wasteful number, since it uses less digits than its factorization.

398654907863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40234.

The product of its (nonzero) digits is 235146240, while the sum is 68.

The spelling of 398654907863 in words is "three hundred ninety-eight billion, six hundred fifty-four million, nine hundred seven thousand, eight hundred sixty-three".