3953128865613 has 4 divisors (see below), whose sum is σ = 5270838487488. Its totient is φ = 2635419243740.

The previous prime is 3953128865561. The next prime is 3953128865669. The reversal of 3953128865613 is 3165688213593.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3953128865613 - 2¹⁸ = 3953128603469 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 (3953128865113) 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, 658854810933 + ... + 658854810938.

It is an arithmetic number, because the mean of its divisors is an integer number (1317709621872).

Almost surely, 2^{3953128865613} is an apocalyptic number.

It is an amenable number.

3953128865613 is a deficient number, since it is larger than the sum of its proper divisors (1317709621875).

3953128865613 is a wasteful number, since it uses less digits than its factorization.

3953128865613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317709621874.

The product of its digits is 27993600, while the sum is 60.

The spelling of 3953128865613 in words is "three trillion, nine hundred fifty-three billion, one hundred twenty-eight million, eight hundred sixty-five thousand, six hundred thirteen".