11643553025 has 24 divisors (see below), whose sum is σ = 15553863864. Its totient is φ = 8595417600.

The previous prime is 11643552989. The next prime is 11643553043. The reversal of 11643553025 is 52035534611.

It can be written as a sum of positive squares in 12 ways, for example, as 1731558544 + 9911994481 = 41612^2 + 99559^2 .

It is not a de Polignac number, because 11643553025 - 2⁸ = 11643552769 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 (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1698605 + ... + 1705445.

It is an arithmetic number, because the mean of its divisors is an integer number (648077661).

Almost surely, 2^11643553025 is an apocalyptic number.

It is an amenable number.

11643553025 is a deficient number, since it is larger than the sum of its proper divisors (3910310839).

11643553025 is a wasteful number, since it uses less digits than its factorization.

11643553025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12101 (or 12096 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 11643553025 in words is "eleven billion, six hundred forty-three million, five hundred fifty-three thousand, twenty-five".