351778714657 has 2 divisors, whose sum is σ = 351778714658. Its totient is φ = 351778714656.

The previous prime is 351778714643. The next prime is 351778714687. The reversal of 351778714657 is 756417877153.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289410644961 + 62368069696 = 537969^2 + 249736^2 .

It is a cyclic number.

It is not a de Polignac number, because 351778714657 - 2¹⁵ = 351778681889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 351778714595 and 351778714604.

It is not a weakly prime, because it can be changed into another prime (351778714687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175889357328 + 175889357329.

It is an arithmetic number, because the mean of its divisors is an integer number (175889357329).

Almost surely, 2^351778714657 is an apocalyptic number.

It is an amenable number.

351778714657 is a deficient number, since it is larger than the sum of its proper divisors (1).

351778714657 is an equidigital number, since it uses as much as digits as its factorization.

351778714657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34574400, while the sum is 61.

The spelling of 351778714657 in words is "three hundred fifty-one billion, seven hundred seventy-eight million, seven hundred fourteen thousand, six hundred fifty-seven".