3949911219545 has 16 divisors (see below), whose sum is σ = 5079650814720. Its totient is φ = 2940850465344.

The previous prime is 3949911219521. The next prime is 3949911219559. The reversal of 3949911219545 is 5459121199493.

It is a cyclic number.

It is not a de Polignac number, because 3949911219545 - 2¹⁸ = 3949910957401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 464145125 + ... + 464153634.

It is an arithmetic number, because the mean of its divisors is an integer number (317478175920).

Almost surely, 2^{3949911219545} is an apocalyptic number.

It is an amenable number.

3949911219545 is a deficient number, since it is larger than the sum of its proper divisors (1129739595175).

3949911219545 is a wasteful number, since it uses less digits than its factorization.

3949911219545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928298824.

The product of its digits is 15746400, while the sum is 62.

The spelling of 3949911219545 in words is "three trillion, nine hundred forty-nine billion, nine hundred eleven million, two hundred nineteen thousand, five hundred forty-five".