347145727561 has 4 divisors (see below), whose sum is σ = 347155894800. Its totient is φ = 347135560324.

The previous prime is 347145727553. The next prime is 347145727603. The reversal of 347145727561 is 165727541743.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 347145727561 - 2³ = 347145727553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 347145727499 and 347145727508.

It is not an unprimeable number, because it can be changed into a prime (347145727531) 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, 5032231 + ... + 5100748.

It is an arithmetic number, because the mean of its divisors is an integer number (86788973700).

Almost surely, 2^347145727561 is an apocalyptic number.

It is an amenable number.

347145727561 is a deficient number, since it is larger than the sum of its proper divisors (10167239).

347145727561 is a wasteful number, since it uses less digits than its factorization.

347145727561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10167238.

The product of its digits is 4939200, while the sum is 52.

The spelling of 347145727561 in words is "three hundred forty-seven billion, one hundred forty-five million, seven hundred twenty-seven thousand, five hundred sixty-one".