13644535453025 has 12 divisors (see below), whose sum is σ = 16927562725500. Its totient is φ = 10910248514880.

The previous prime is 13644535453001. The next prime is 13644535453049. The reversal of 13644535453025 is 52035453544631.

It is an interprime number because it is at equal distance from previous prime (13644535453001) and next prime (13644535453049).

It can be written as a sum of positive squares in 6 ways, for example, as 1286210028544 + 12358325424481 = 1134112^2 + 3515441^2 .

It is not a de Polignac number, because 13644535453025 - 2¹⁰ = 13644535452001 is a prime.

It is a super-2 number, since 2×13644535453025² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134444450 + ... + 134545899.

It is an arithmetic number, because the mean of its divisors is an integer number (1410630227125).

Almost surely, 2^{13644535453025} is an apocalyptic number.

It is an amenable number.

13644535453025 is a deficient number, since it is larger than the sum of its proper divisors (3283027272475).

13644535453025 is a wasteful number, since it uses less digits than its factorization.

13644535453025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268992388 (or 268992383 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 50.

Adding to 13644535453025 its reverse (52035453544631), we get a palindrome (65679988997656).

The spelling of 13644535453025 in words is "thirteen trillion, six hundred forty-four billion, five hundred thirty-five million, four hundred fifty-three thousand, twenty-five".