999998477238474 has 192 divisors, whose sum is σ = 2606656600089600. Its totient is φ = 278367896972160.

The previous prime is 999998477238389. The next prime is 999998477238511. The reversal of 999998477238474 is 474832774899999.

999998477238474 is a `hidden beast` number, since 9 + 9 + 9 + 9 + 9 + 84 + 7 + 72 + 384 + 74 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 468509109 + ... + 470638695.

It is an arithmetic number, because the mean of its divisors is an integer number (13576336458800).

Almost surely, 2^{999998477238474} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999998477238474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1303328300044800).

999998477238474 is an abundant number, since it is smaller than the sum of its proper divisors (1606658122851126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999998477238474 is a wasteful number, since it uses less digits than its factorization.

999998477238474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130426 (or 2130379 counting only the distinct ones).

The product of its digits is 497757560832, while the sum is 99.

The spelling of 999998477238474 in words is "nine hundred ninety-nine trillion, nine hundred ninety-eight billion, four hundred seventy-seven million, two hundred thirty-eight thousand, four hundred seventy-four".