13643525025 has 36 divisors (see below), whose sum is σ = 26316849468. Its totient is φ = 6716810880.

The previous prime is 13643524969. The next prime is 13643525029. The reversal of 13643525025 is 52052534631.

13643525025 is a `hidden beast` number, since 1 + 3 + 643 + 5 + 2 + 5 + 0 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 4819552929 + 8823972096 = 69423^2 + 93936^2 .

It is not a de Polignac number, because 13643525025 - 2¹³ = 13643516833 is a prime.

It is a super-2 number, since 2×13643525025² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13643525029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2329302 + ... + 2335151.

Almost surely, 2^13643525025 is an apocalyptic number.

13643525025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13643525025 is a deficient number, since it is larger than the sum of its proper divisors (12673324443).

13643525025 is a wasteful number, since it uses less digits than its factorization.

13643525025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4664482 (or 4664474 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 13643525025 in words is "thirteen billion, six hundred forty-three million, five hundred twenty-five thousand, twenty-five".