398136864807 has 12 divisors (see below), whose sum is σ = 627367181064. Its totient is φ = 241295069520.

The previous prime is 398136864737. The next prime is 398136864871. The reversal of 398136864807 is 708468631893.

398136864807 is a `hidden beast` number, since 3 + 98 + 1 + 3 + 68 + 6 + 480 + 7 = 666.

It is not a de Polignac number, because 398136864807 - 2¹⁹ = 398136340519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398136864887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2010792148 + ... + 2010792345.

It is an arithmetic number, because the mean of its divisors is an integer number (52280598422).

Almost surely, 2^398136864807 is an apocalyptic number.

398136864807 is a deficient number, since it is larger than the sum of its proper divisors (229230316257).

398136864807 is a wasteful number, since it uses less digits than its factorization.

398136864807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4021584510 (or 4021584507 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 63.

The spelling of 398136864807 in words is "three hundred ninety-eight billion, one hundred thirty-six million, eight hundred sixty-four thousand, eight hundred seven".