398046991185 has 80 divisors (see below), whose sum is σ = 726848014464. Its totient is φ = 208367728128.

The previous prime is 398046991087. The next prime is 398046991201. The reversal of 398046991185 is 581199640893.

398046991185 is a `hidden beast` number, since 3 + 9 + 8 + 0 + 469 + 91 + 1 + 85 = 666.

It is not a de Polignac number, because 398046991185 - 2⁹ = 398046990673 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4671574 + ... + 4756016.

Almost surely, 2^398046991185 is an apocalyptic number.

It is an amenable number.

398046991185 is a deficient number, since it is larger than the sum of its proper divisors (328801023279).

398046991185 is a wasteful number, since it uses less digits than its factorization.

398046991185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84676 (or 84667 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 63.

The spelling of 398046991185 in words is "three hundred ninety-eight billion, forty-six million, nine hundred ninety-one thousand, one hundred eighty-five".