3910465811921 has 16 divisors (see below), whose sum is σ = 3930782625360. Its totient is φ = 3890200258560.

The previous prime is 3910465811873. The next prime is 3910465811971. The reversal of 3910465811921 is 1291185640193.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2951317843600 + 959147968321 = 1717940^2 + 979361^2 .

It is a cyclic number.

It is not a de Polignac number, because 3910465811921 - 2²² = 3910461617617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3910465811921.

It is not an unprimeable number, because it can be changed into a prime (3910465811971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 501788201 + ... + 501795993.

It is an arithmetic number, because the mean of its divisors is an integer number (245673914085).

Almost surely, 2^{3910465811921} is an apocalyptic number.

It is an amenable number.

3910465811921 is a deficient number, since it is larger than the sum of its proper divisors (20316813439).

3910465811921 is a wasteful number, since it uses less digits than its factorization.

3910465811921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10756.

The product of its (nonzero) digits is 466560, while the sum is 50.

The spelling of 3910465811921 in words is "three trillion, nine hundred ten billion, four hundred sixty-five million, eight hundred eleven thousand, nine hundred twenty-one".