344857354021 has 2 divisors, whose sum is σ = 344857354022. Its totient is φ = 344857354020.

The previous prime is 344857353991. The next prime is 344857354097. The reversal of 344857354021 is 120453758443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227629181025 + 117228172996 = 477105^2 + 342386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-344857354021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344857355021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172428677010 + 172428677011.

It is an arithmetic number, because the mean of its divisors is an integer number (172428677011).

Almost surely, 2^344857354021 is an apocalyptic number.

It is an amenable number.

344857354021 is a deficient number, since it is larger than the sum of its proper divisors (1).

344857354021 is an equidigital number, since it uses as much as digits as its factorization.

344857354021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1612800, while the sum is 46.

The spelling of 344857354021 in words is "three hundred forty-four billion, eight hundred fifty-seven million, three hundred fifty-four thousand, twenty-one".