355966421389 has 2 divisors, whose sum is σ = 355966421390. Its totient is φ = 355966421388.

The previous prime is 355966421383. The next prime is 355966421407. The reversal of 355966421389 is 983124669553.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234562956489 + 121403464900 = 484317^2 + 348430^2 .

It is a cyclic number.

It is not a de Polignac number, because 355966421389 - 2¹⁵ = 355966388621 is a prime.

It is a super-2 number, since 2×355966421389² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (355966421383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177983210694 + 177983210695.

It is an arithmetic number, because the mean of its divisors is an integer number (177983210695).

Almost surely, 2^355966421389 is an apocalyptic number.

It is an amenable number.

355966421389 is a deficient number, since it is larger than the sum of its proper divisors (1).

355966421389 is an equidigital number, since it uses as much as digits as its factorization.

355966421389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41990400, while the sum is 61.

The spelling of 355966421389 in words is "three hundred fifty-five billion, nine hundred sixty-six million, four hundred twenty-one thousand, three hundred eighty-nine".