354543542403521 has 16 divisors (see below), whose sum is σ = 362953274523840. Its totient is φ = 346141324650240.

The previous prime is 354543542403503. The next prime is 354543542403527. The reversal of 354543542403521 is 125304245345453.

It is a de Polignac number, because none of the positive numbers 2^k-354543542403521 is a prime.

It is a super-2 number, since 2×354543542403521² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 354543542403521.

It is not an unprimeable number, because it can be changed into a prime (354543542403527) 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, 855101741 + ... + 855516261.

It is an arithmetic number, because the mean of its divisors is an integer number (22684579657740).

Almost surely, 2^{354543542403521} is an apocalyptic number.

It is an amenable number.

354543542403521 is a deficient number, since it is larger than the sum of its proper divisors (8409732120319).

354543542403521 is a wasteful number, since it uses less digits than its factorization.

354543542403521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423536.

The product of its (nonzero) digits is 17280000, while the sum is 50.

Adding to 354543542403521 its reverse (125304245345453), we get a palindrome (479847787748974).

The spelling of 354543542403521 in words is "three hundred fifty-four trillion, five hundred forty-three billion, five hundred forty-two million, four hundred three thousand, five hundred twenty-one".