354216607721 has 8 divisors (see below), whose sum is σ = 354628509888. Its totient is φ = 353804850000.

The previous prime is 354216607691. The next prime is 354216607733. The reversal of 354216607721 is 127706612453.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-354216607721 is a prime.

It is a super-3 number, since 3×354216607721³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (354216607751) 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, 5328116 + ... + 5394186.

It is an arithmetic number, because the mean of its divisors is an integer number (44328563736).

Almost surely, 2^354216607721 is an apocalyptic number.

It is an amenable number.

354216607721 is a deficient number, since it is larger than the sum of its proper divisors (411902167).

354216607721 is a wasteful number, since it uses less digits than its factorization.

354216607721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72223.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 354216607721 in words is "three hundred fifty-four billion, two hundred sixteen million, six hundred seven thousand, seven hundred twenty-one".