345517256661 has 8 divisors (see below), whose sum is σ = 461401717824. Its totient is φ = 229988816640.

The previous prime is 345517256647. The next prime is 345517256681. The reversal of 345517256661 is 166652715543.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 345517256661 - 2¹⁸ = 345516994517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345517256681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89003020 + ... + 89006901.

It is an arithmetic number, because the mean of its divisors is an integer number (57675214728).

Almost surely, 2^345517256661 is an apocalyptic number.

It is an amenable number.

345517256661 is a deficient number, since it is larger than the sum of its proper divisors (115884461163).

345517256661 is a wasteful number, since it uses less digits than its factorization.

345517256661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178010571.

The product of its digits is 4536000, while the sum is 51.

The spelling of 345517256661 in words is "three hundred forty-five billion, five hundred seventeen million, two hundred fifty-six thousand, six hundred sixty-one".