3810013913721 has 16 divisors (see below), whose sum is σ = 5379496775424. Its totient is φ = 2390306475264.

The previous prime is 3810013913647. The next prime is 3810013913731. The reversal of 3810013913721 is 1273193100183.

It is not a de Polignac number, because 3810013913721 - 2¹⁹ = 3810013389433 is a prime.

It is a super-2 number, since 2×3810013913721² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3810013913721.

It is not an unprimeable number, because it can be changed into a prime (3810013913731) 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, 4114705 + ... + 4954878.

It is an arithmetic number, because the mean of its divisors is an integer number (336218548464).

Almost surely, 2^{3810013913721} is an apocalyptic number.

It is an amenable number.

3810013913721 is a deficient number, since it is larger than the sum of its proper divisors (1569482861703).

3810013913721 is a wasteful number, since it uses less digits than its factorization.

3810013913721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9077840.

The product of its (nonzero) digits is 27216, while the sum is 39.

The spelling of 3810013913721 in words is "three trillion, eight hundred ten billion, thirteen million, nine hundred thirteen thousand, seven hundred twenty-one".