354216631781 has 4 divisors (see below), whose sum is σ = 355231579500. Its totient is φ = 353201684064.

The previous prime is 354216631757. The next prime is 354216631793. The reversal of 354216631781 is 187136612453.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 305908548100 + 48308083681 = 553090^2 + 219791^2 .

It is a cyclic number.

It is not a de Polignac number, because 354216631781 - 2²⁶ = 354149522917 is a prime.

It is a super-3 number, since 3×354216631781³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354212631781) 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, 507473336 + ... + 507474033.

It is an arithmetic number, because the mean of its divisors is an integer number (88807894875).

Almost surely, 2^354216631781 is an apocalyptic number.

It is an amenable number.

354216631781 is a deficient number, since it is larger than the sum of its proper divisors (1014947719).

354216631781 is a wasteful number, since it uses less digits than its factorization.

354216631781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014947718.

The product of its digits is 725760, while the sum is 47.

The spelling of 354216631781 in words is "three hundred fifty-four billion, two hundred sixteen million, six hundred thirty-one thousand, seven hundred eighty-one".