351361855517 has 2 divisors, whose sum is σ = 351361855518. Its totient is φ = 351361855516.

The previous prime is 351361855483. The next prime is 351361855543. The reversal of 351361855517 is 715558163153.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221488831876 + 129873023641 = 470626^2 + 360379^2 .

It is a cyclic number.

It is not a de Polignac number, because 351361855517 - 2⁸ = 351361855261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (351361855577) 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, 175680927758 + 175680927759.

It is an arithmetic number, because the mean of its divisors is an integer number (175680927759).

Almost surely, 2^351361855517 is an apocalyptic number.

It is an amenable number.

351361855517 is a deficient number, since it is larger than the sum of its proper divisors (1).

351361855517 is an equidigital number, since it uses as much as digits as its factorization.

351361855517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890000, while the sum is 50.

The spelling of 351361855517 in words is "three hundred fifty-one billion, three hundred sixty-one million, eight hundred fifty-five thousand, five hundred seventeen".