344921710521 has 16 divisors (see below), whose sum is σ = 475832475648. Its totient is φ = 222013798800.

The previous prime is 344921710499. The next prime is 344921710561. The reversal of 344921710521 is 125017129443.

It is not a de Polignac number, because 344921710521 - 2⁵ = 344921710489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 344921710521.

It is not an unprimeable number, because it can be changed into a prime (344921710561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4262511 + ... + 4342676.

It is an arithmetic number, because the mean of its divisors is an integer number (29739529728).

Almost surely, 2^344921710521 is an apocalyptic number.

344921710521 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

344921710521 is a deficient number, since it is larger than the sum of its proper divisors (130910765127).

344921710521 is a wasteful number, since it uses less digits than its factorization.

344921710521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8605652.

The product of its (nonzero) digits is 60480, while the sum is 39.

Adding to 344921710521 its reverse (125017129443), we get a palindrome (469938839964).

The spelling of 344921710521 in words is "three hundred forty-four billion, nine hundred twenty-one million, seven hundred ten thousand, five hundred twenty-one".