345643381477 has 2 divisors, whose sum is σ = 345643381478. Its totient is φ = 345643381476.

The previous prime is 345643381451. The next prime is 345643381519. The reversal of 345643381477 is 774183346543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 326396258721 + 19247122756 = 571311^2 + 138734^2 .

It is a cyclic number.

It is not a de Polignac number, because 345643381477 - 2²⁷ = 345509163749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345643381877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172821690738 + 172821690739.

It is an arithmetic number, because the mean of its divisors is an integer number (172821690739).

Almost surely, 2^345643381477 is an apocalyptic number.

It is an amenable number.

345643381477 is a deficient number, since it is larger than the sum of its proper divisors (1).

345643381477 is an equidigital number, since it uses as much as digits as its factorization.

345643381477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20321280, while the sum is 55.

The spelling of 345643381477 in words is "three hundred forty-five billion, six hundred forty-three million, three hundred eighty-one thousand, four hundred seventy-seven".