1994577167025 has 27 divisors (see below), whose sum is σ = 3572547269889. Its totient is φ = 1063763190720.

The previous prime is 1994577167017. The next prime is 1994577167053. The reversal of 1994577167025 is 5207617754991.

The square root of 1994577167025 is 1412295.

It is a perfect power (a square), and thus also a powerful number.

1994577167025 is a `hidden beast` number, since 1 + 99 + 457 + 7 + 1 + 6 + 70 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 118192251681 + 1876384915344 = 343791^2 + 1369812^2 .

It is not a de Polignac number, because 1994577167025 - 2³ = 1994577167017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 21137349 + ... + 21231501.

Almost surely, 2^{1994577167025} is an apocalyptic number.

1994577167025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1994577167025 is the 1412295-th square number.

1994577167025 is the 706148-th centered octagonal number.

It is an amenable number.

1994577167025 is a deficient number, since it is larger than the sum of its proper divisors (1577970102864).

1994577167025 is an frugal number, since it uses more digits than its factorization.

1994577167025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188322 (or 94161 counting only the distinct ones).

The product of its (nonzero) digits is 33339600, while the sum is 63.

The spelling of 1994577167025 in words is "one trillion, nine hundred ninety-four billion, five hundred seventy-seven million, one hundred sixty-seven thousand, twenty-five".