999054975478 has 32 divisors (see below), whose sum is σ = 1813481395200. Its totient is φ = 402964450944.

The previous prime is 999054975379. The next prime is 999054975491. The reversal of 999054975478 is 874579450999.

It is a super-2 number, since 2×999054975478² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7516563 + ... + 7648321.

It is an arithmetic number, because the mean of its divisors is an integer number (56671293600).

Almost surely, 2^999054975478 is an apocalyptic number.

999054975478 is a deficient number, since it is larger than the sum of its proper divisors (814426419722).

999054975478 is a wasteful number, since it uses less digits than its factorization.

999054975478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163644.

The product of its (nonzero) digits is 1028764800, while the sum is 76.

The spelling of 999054975478 in words is "nine hundred ninety-nine billion, fifty-four million, nine hundred seventy-five thousand, four hundred seventy-eight".