3649772917439 has 4 divisors (see below), whose sum is σ = 3981570455400. Its totient is φ = 3317975379480.

The previous prime is 3649772917429. The next prime is 3649772917487. The reversal of 3649772917439 is 9347192779463.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3649772917439 - 2²⁰ = 3649771868863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649772917429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165898768964 + ... + 165898768985.

It is an arithmetic number, because the mean of its divisors is an integer number (995392613850).

Almost surely, 2^{3649772917439} is an apocalyptic number.

3649772917439 is a deficient number, since it is larger than the sum of its proper divisors (331797537961).

3649772917439 is a wasteful number, since it uses less digits than its factorization.

3649772917439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331797537960.

The product of its digits is 432081216, while the sum is 71.

The spelling of 3649772917439 in words is "three trillion, six hundred forty-nine billion, seven hundred seventy-two million, nine hundred seventeen thousand, four hundred thirty-nine".