3649430426885 has 8 divisors (see below), whose sum is σ = 4379358745080. Its totient is φ = 2919516186304.

The previous prime is 3649430426881. The next prime is 3649430426909. The reversal of 3649430426885 is 5886240349463.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 130061930881 + 3519368496004 = 360641^2 + 1875998^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3649430426885 - 2² = 3649430426881 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649430426881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2940422 + ... + 3993111.

It is an arithmetic number, because the mean of its divisors is an integer number (547419843135).

Almost surely, 2^{3649430426885} is an apocalyptic number.

It is an amenable number.

3649430426885 is a deficient number, since it is larger than the sum of its proper divisors (729928318195).

3649430426885 is a wasteful number, since it uses less digits than its factorization.

3649430426885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7038807.

The product of its (nonzero) digits is 119439360, while the sum is 62.

The spelling of 3649430426885 in words is "three trillion, six hundred forty-nine billion, four hundred thirty million, four hundred twenty-six thousand, eight hundred eighty-five".