398878163511 has 16 divisors (see below), whose sum is σ = 564241676544. Its totient is φ = 249778911104.

The previous prime is 398878163479. The next prime is 398878163533. The reversal of 398878163511 is 115361878893.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 398878163511 - 2⁵ = 398878163479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398878163111) 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, 7748841 + ... + 7800146.

It is an arithmetic number, because the mean of its divisors is an integer number (35265104784).

Almost surely, 2^398878163511 is an apocalyptic number.

398878163511 is a deficient number, since it is larger than the sum of its proper divisors (165363513033).

398878163511 is a wasteful number, since it uses less digits than its factorization.

398878163511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15549510.

The product of its digits is 8709120, while the sum is 60.

The spelling of 398878163511 in words is "three hundred ninety-eight billion, eight hundred seventy-eight million, one hundred sixty-three thousand, five hundred eleven".