345736781849 has 2 divisors, whose sum is σ = 345736781850. Its totient is φ = 345736781848.

The previous prime is 345736781833. The next prime is 345736781867. The reversal of 345736781849 is 948187637543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289831489600 + 55905292249 = 538360^2 + 236443^2 .

It is a cyclic number.

It is not a de Polignac number, because 345736781849 - 2⁴ = 345736781833 is a prime.

It is not a weakly prime, because it can be changed into another prime (345736781249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172868390924 + 172868390925.

It is an arithmetic number, because the mean of its divisors is an integer number (172868390925).

Almost surely, 2^345736781849 is an apocalyptic number.

It is an amenable number.

345736781849 is a deficient number, since it is larger than the sum of its proper divisors (1).

345736781849 is an equidigital number, since it uses as much as digits as its factorization.

345736781849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 121927680, while the sum is 65.

The spelling of 345736781849 in words is "three hundred forty-five billion, seven hundred thirty-six million, seven hundred eighty-one thousand, eight hundred forty-nine".