1622856879349 has 2 divisors, whose sum is σ = 1622856879350. Its totient is φ = 1622856879348.

The previous prime is 1622856879313. The next prime is 1622856879433. The reversal of 1622856879349 is 9439786582261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1211886134449 + 410970744900 = 1100857^2 + 641070^2 .

It is a cyclic number.

It is not a de Polignac number, because 1622856879349 - 2¹³ = 1622856871157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1622856879649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811428439674 + 811428439675.

It is an arithmetic number, because the mean of its divisors is an integer number (811428439675).

Almost surely, 2^{1622856879349} is an apocalyptic number.

It is an amenable number.

1622856879349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1622856879349 is an equidigital number, since it uses as much as digits as its factorization.

1622856879349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 313528320, while the sum is 70.

The spelling of 1622856879349 in words is "one trillion, six hundred twenty-two billion, eight hundred fifty-six million, eight hundred seventy-nine thousand, three hundred forty-nine".