344827965521 has 4 divisors (see below), whose sum is σ = 371353193652. Its totient is φ = 318302737392.

The previous prime is 344827965389. The next prime is 344827965527. The reversal of 344827965521 is 125569728443.

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 181272429121 + 163555536400 = 425761^2 + 404420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-344827965521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (344827965527) 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, 13262614046 + ... + 13262614071.

It is an arithmetic number, because the mean of its divisors is an integer number (92838298413).

Almost surely, 2^344827965521 is an apocalyptic number.

It is an amenable number.

344827965521 is a deficient number, since it is larger than the sum of its proper divisors (26525228131).

344827965521 is a wasteful number, since it uses less digits than its factorization.

344827965521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26525228130.

The product of its digits is 14515200, while the sum is 56.

The spelling of 344827965521 in words is "three hundred forty-four billion, eight hundred twenty-seven million, nine hundred sixty-five thousand, five hundred twenty-one".