999174402025 has 24 divisors (see below), whose sum is σ = 1357093687320. Its totient is φ = 726377487360.

The previous prime is 999174401987. The next prime is 999174402073. The reversal of 999174402025 is 520204471999.

It can be written as a sum of positive squares in 12 ways, for example, as 80513495001 + 918660907024 = 283749^2 + 958468^2 .

It is not a de Polignac number, because 999174402025 - 2²⁷ = 999040184297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40522134 + ... + 40546783.

It is an arithmetic number, because the mean of its divisors is an integer number (56545570305).

Almost surely, 2^999174402025 is an apocalyptic number.

It is an amenable number.

999174402025 is a deficient number, since it is larger than the sum of its proper divisors (357919285295).

999174402025 is a wasteful number, since it uses less digits than its factorization.

999174402025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81068973 (or 81068968 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 999174402025 in words is "nine hundred ninety-nine billion, one hundred seventy-four million, four hundred two thousand, twenty-five".