3956311424521 has 4 divisors (see below), whose sum is σ = 3968264027344. Its totient is φ = 3944358821700.

The previous prime is 3956311424509. The next prime is 3956311424581. The reversal of 3956311424521 is 1254241136593.

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 3956311424521 - 2¹⁷ = 3956311293449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3956311424581) 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, 5976300915 + ... + 5976301576.

It is an arithmetic number, because the mean of its divisors is an integer number (992066006836).

Almost surely, 2^{3956311424521} is an apocalyptic number.

It is an amenable number.

3956311424521 is a deficient number, since it is larger than the sum of its proper divisors (11952602823).

3956311424521 is a wasteful number, since it uses less digits than its factorization.

3956311424521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11952602822.

The product of its digits is 777600, while the sum is 46.

The spelling of 3956311424521 in words is "three trillion, nine hundred fifty-six billion, three hundred eleven million, four hundred twenty-four thousand, five hundred twenty-one".