43649351325 has 36 divisors (see below), whose sum is σ = 80087704788. Its totient is φ = 22711852800.

The previous prime is 43649351293. The next prime is 43649351327. The reversal of 43649351325 is 52315394634.

43649351325 is a `hidden beast` number, since 43 + 6 + 4 + 93 + 513 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 7411660281 + 36237691044 = 86091^2 + 190362^2 .

It is not a de Polignac number, because 43649351325 - 2⁵ = 43649351293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43649351327) 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, 2356594 + ... + 2375043.

Almost surely, 2^43649351325 is an apocalyptic number.

43649351325 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43649351325 is a deficient number, since it is larger than the sum of its proper divisors (36438353463).

43649351325 is a wasteful number, since it uses less digits than its factorization.

43649351325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4731694 (or 4731686 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 45.

The spelling of 43649351325 in words is "forty-three billion, six hundred forty-nine million, three hundred fifty-one thousand, three hundred twenty-five".