3953550538321 has 4 divisors (see below), whose sum is σ = 3953854600432. Its totient is φ = 3953246476212.

The previous prime is 3953550538309. The next prime is 3953550538331. The reversal of 3953550538321 is 1238350553593.

3953550538321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-3953550538321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3953550538331) 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, 152011551 + ... + 152037556.

It is an arithmetic number, because the mean of its divisors is an integer number (988463650108).

Almost surely, 2^{3953550538321} is an apocalyptic number.

It is an amenable number.

3953550538321 is a deficient number, since it is larger than the sum of its proper divisors (304062111).

3953550538321 is a wasteful number, since it uses less digits than its factorization.

3953550538321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304062110.

The product of its (nonzero) digits is 7290000, while the sum is 52.

The spelling of 3953550538321 in words is "three trillion, nine hundred fifty-three billion, five hundred fifty million, five hundred thirty-eight thousand, three hundred twenty-one".