10989191850025 has 9 divisors (see below), whose sum is σ = 13626618447031. Its totient is φ = 8791340220040.

The previous prime is 10989191850001. The next prime is 10989191850061. The reversal of 10989191850025 is 52005819198901.

The square root of 10989191850025 is 3314995.

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

It can be written as a sum of positive squares in only one way, i.e., 3956109066009 + 7033082784016 = 1988997^2 + 2651996^2 .

It is a de Polignac number, because none of the positive numbers 2^k-10989191850025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 16243476 + ... + 16906474.

Almost surely, 2^{10989191850025} is an apocalyptic number.

10989191850025 is the 3314995-th square number.

10989191850025 is the 1657498-th centered octagonal number.

It is an amenable number.

10989191850025 is a deficient number, since it is larger than the sum of its proper divisors (2637426597006).

10989191850025 is an frugal number, since it uses more digits than its factorization.

10989191850025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326008 (or 663004 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 58.

The spelling of 10989191850025 in words is "ten trillion, nine hundred eighty-nine billion, one hundred ninety-one million, eight hundred fifty thousand, twenty-five".