351868686853 has 4 divisors (see below), whose sum is σ = 351874314028. Its totient is φ = 351863059680.

The previous prime is 351868686821. The next prime is 351868686881. The reversal of 351868686853 is 358686868153.

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 187213713124 + 164654973729 = 432682^2 + 405777^2 .

It is a cyclic number.

It is not a de Polignac number, because 351868686853 - 2⁵ = 351868686821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351868686803) 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, 2718726 + ... + 2845207.

It is an arithmetic number, because the mean of its divisors is an integer number (87968578507).

Almost surely, 2^351868686853 is an apocalyptic number.

It is an amenable number.

351868686853 is a deficient number, since it is larger than the sum of its proper divisors (5627175).

351868686853 is an equidigital number, since it uses as much as digits as its factorization.

351868686853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5627174.

The product of its digits is 199065600, while the sum is 67.

The spelling of 351868686853 in words is "three hundred fifty-one billion, eight hundred sixty-eight million, six hundred eighty-six thousand, eight hundred fifty-three".