345509738641 has 4 divisors (see below), whose sum is σ = 365833840932. Its totient is φ = 325185636352.

The previous prime is 345509738633. The next prime is 345509738689. The reversal of 345509738641 is 146837905543.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 146837905543 = 7 ⋅20976843649.

It can be written as a sum of positive squares in 2 ways, for example, as 234930212416 + 110579526225 = 484696^2 + 332535^2 .

It is a cyclic number.

It is not a de Polignac number, because 345509738641 - 2³ = 345509738633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345509738741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10162051120 + ... + 10162051153.

It is an arithmetic number, because the mean of its divisors is an integer number (91458460233).

Almost surely, 2^345509738641 is an apocalyptic number.

It is an amenable number.

345509738641 is a deficient number, since it is larger than the sum of its proper divisors (20324102291).

345509738641 is a wasteful number, since it uses less digits than its factorization.

345509738641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20324102290.

The product of its (nonzero) digits is 10886400, while the sum is 55.

The spelling of 345509738641 in words is "three hundred forty-five billion, five hundred nine million, seven hundred thirty-eight thousand, six hundred forty-one".