9541603501421 has 4 divisors (see below), whose sum is σ = 9763501257312. Its totient is φ = 9319705745532.

The previous prime is 9541603501399. The next prime is 9541603501429. The reversal of 9541603501421 is 1241053061459.

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 9541603501421 - 2⁶ = 9541603501357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9541603501429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110948877881 + ... + 110948877966.

It is an arithmetic number, because the mean of its divisors is an integer number (2440875314328).

Almost surely, 2^{9541603501421} is an apocalyptic number.

It is an amenable number.

9541603501421 is a deficient number, since it is larger than the sum of its proper divisors (221897755891).

9541603501421 is a wasteful number, since it uses less digits than its factorization.

9541603501421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221897755890.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 9541603501421 in words is "nine trillion, five hundred forty-one billion, six hundred three million, five hundred one thousand, four hundred twenty-one".