354256574362721 has 2 divisors, whose sum is σ = 354256574362722. Its totient is φ = 354256574362720.

The previous prime is 354256574362693. The next prime is 354256574362771. The reversal of 354256574362721 is 127263475652453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191626849414225 + 162629724948496 = 13842935^2 + 12752636^2 .

It is a cyclic number.

It is not a de Polignac number, because 354256574362721 - 2³⁰ = 354255500620897 is a prime.

It is a super-3 number, since 3×354256574362721³ (a number of 45 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (354256574362771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177128287181360 + 177128287181361.

It is an arithmetic number, because the mean of its divisors is an integer number (177128287181361).

Almost surely, 2^{354256574362721} is an apocalyptic number.

It is an amenable number.

354256574362721 is a deficient number, since it is larger than the sum of its proper divisors (1).

354256574362721 is an equidigital number, since it uses as much as digits as its factorization.

354256574362721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016000, while the sum is 62.

The spelling of 354256574362721 in words is "three hundred fifty-four trillion, two hundred fifty-six billion, five hundred seventy-four million, three hundred sixty-two thousand, seven hundred twenty-one".