348109291681 has 4 divisors (see below), whose sum is σ = 348584202772. Its totient is φ = 347634380592.

The previous prime is 348109291667. The next prime is 348109291697. The reversal of 348109291681 is 186192901843.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 152494155025 + 195615136656 = 390505^2 + 442284^2 .

It is a cyclic number.

It is not a de Polignac number, because 348109291681 - 2⁷ = 348109291553 is a prime.

It is a super-2 number, since 2×348109291681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (348109291661) 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, 237454446 + ... + 237455911.

It is an arithmetic number, because the mean of its divisors is an integer number (87146050693).

Almost surely, 2^348109291681 is an apocalyptic number.

It is an amenable number.

348109291681 is a deficient number, since it is larger than the sum of its proper divisors (474911091).

348109291681 is an equidigital number, since it uses as much as digits as its factorization.

348109291681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474911090.

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 348109291681 in words is "three hundred forty-eight billion, one hundred nine million, two hundred ninety-one thousand, six hundred eighty-one".