351640323401 has 4 divisors (see below), whose sum is σ = 351658424832. Its totient is φ = 351622221972.

The previous prime is 351640323343. The next prime is 351640323403. The reversal of 351640323401 is 104323046153.

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 351640323401 - 2¹⁰ = 351640322377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (351640323403) 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, 9021545 + ... + 9060438.

It is an arithmetic number, because the mean of its divisors is an integer number (87914606208).

Almost surely, 2^351640323401 is an apocalyptic number.

It is an amenable number.

351640323401 is a deficient number, since it is larger than the sum of its proper divisors (18101431).

351640323401 is a wasteful number, since it uses less digits than its factorization.

351640323401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18101430.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 351640323401 its reverse (104323046153), we get a palindrome (455963369554).

The spelling of 351640323401 in words is "three hundred fifty-one billion, six hundred forty million, three hundred twenty-three thousand, four hundred one".