354216631821 has 8 divisors (see below), whose sum is σ = 508618753440. Its totient is φ = 217979465712.

The previous prime is 354216631801. The next prime is 354216631831. The reversal of 354216631821 is 128136612453.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 354216631821 - 2⁶ = 354216631757 is a prime.

It is a super-3 number, since 3×354216631821³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354216631801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4541238831 + ... + 4541238908.

It is an arithmetic number, because the mean of its divisors is an integer number (63577344180).

Almost surely, 2^354216631821 is an apocalyptic number.

It is an amenable number.

354216631821 is a deficient number, since it is larger than the sum of its proper divisors (154402121619).

354216631821 is a wasteful number, since it uses less digits than its factorization.

354216631821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9082477755.

The product of its digits is 207360, while the sum is 42.

The spelling of 354216631821 in words is "three hundred fifty-four billion, two hundred sixteen million, six hundred thirty-one thousand, eight hundred twenty-one".