354388664257 has 2 divisors, whose sum is σ = 354388664258. Its totient is φ = 354388664256.

The previous prime is 354388664209. The next prime is 354388664293. The reversal of 354388664257 is 752466883453.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280925440576 + 73463223681 = 530024^2 + 271041^2 .

It is an emirp because it is prime and its reverse (752466883453) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 354388664257 - 2¹⁵ = 354388631489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 354388664195 and 354388664204.

It is not a weakly prime, because it can be changed into another prime (354388664857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177194332128 + 177194332129.

It is an arithmetic number, because the mean of its divisors is an integer number (177194332129).

Almost surely, 2^354388664257 is an apocalyptic number.

It is an amenable number.

354388664257 is a deficient number, since it is larger than the sum of its proper divisors (1).

354388664257 is an equidigital number, since it uses as much as digits as its factorization.

354388664257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116121600, while the sum is 61.

The spelling of 354388664257 in words is "three hundred fifty-four billion, three hundred eighty-eight million, six hundred sixty-four thousand, two hundred fifty-seven".