345556630463777 has 2 divisors, whose sum is σ = 345556630463778. Its totient is φ = 345556630463776.

The previous prime is 345556630463767. The next prime is 345556630463813. The reversal of 345556630463777 is 777364036655543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273286161014161 + 72270469449616 = 16531369^2 + 8501204^2 .

It is a cyclic number.

It is not a de Polignac number, because 345556630463777 - 2¹⁶ = 345556630398241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345556630463777.

It is not a weakly prime, because it can be changed into another prime (345556630463767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172778315231888 + 172778315231889.

It is an arithmetic number, because the mean of its divisors is an integer number (172778315231889).

Almost surely, 2^{345556630463777} is an apocalyptic number.

It is an amenable number.

345556630463777 is a deficient number, since it is larger than the sum of its proper divisors (1).

345556630463777 is an equidigital number, since it uses as much as digits as its factorization.

345556630463777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4000752000, while the sum is 71.

The spelling of 345556630463777 in words is "three hundred forty-five trillion, five hundred fifty-six billion, six hundred thirty million, four hundred sixty-three thousand, seven hundred seventy-seven".