9911049905125 has 16 divisors (see below), whose sum is σ = 12376177645104. Its totient is φ = 7924232640000.

The previous prime is 9911049905101. The next prime is 9911049905147. The reversal of 9911049905125 is 5215099401199.

It is a happy number.

9911049905125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 3148182²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 307360468801 + 9603689436324 = 554401^2 + 3098982^2 .

It is not a de Polignac number, because 9911049905125 - 2¹³ = 9911049896933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22820436 + ... + 23250685.

It is an arithmetic number, because the mean of its divisors is an integer number (773511102819).

Almost surely, 2^{9911049905125} is an apocalyptic number.

It is an amenable number.

9911049905125 is a deficient number, since it is larger than the sum of its proper divisors (2465127739979).

9911049905125 is a wasteful number, since it uses less digits than its factorization.

9911049905125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46072857 (or 46072847 counting only the distinct ones).

The product of its (nonzero) digits is 1312200, while the sum is 55.

The spelling of 9911049905125 in words is "nine trillion, nine hundred eleven billion, forty-nine million, nine hundred five thousand, one hundred twenty-five".