344853551021 has 4 divisors (see below), whose sum is σ = 394118344032. Its totient is φ = 295588758012.

The previous prime is 344853550933. The next prime is 344853551023. The reversal of 344853551021 is 120155358443.

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 a de Polignac number, because none of the positive numbers 2^k-344853551021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 344853551021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (344853551023) 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, 24632396495 + ... + 24632396508.

It is an arithmetic number, because the mean of its divisors is an integer number (98529586008).

Almost surely, 2^344853551021 is an apocalyptic number.

It is an amenable number.

344853551021 is a deficient number, since it is larger than the sum of its proper divisors (49264793011).

344853551021 is an equidigital number, since it uses as much as digits as its factorization.

344853551021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49264793010.

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 344853551021 in words is "three hundred forty-four billion, eight hundred fifty-three million, five hundred fifty-one thousand, twenty-one".