356424066649969 has 2 divisors, whose sum is σ = 356424066649970. Its totient is φ = 356424066649968.

The previous prime is 356424066649967. The next prime is 356424066650089. The reversal of 356424066649969 is 969946660424653.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 333928586806369 + 22495479843600 = 18273713^2 + 4742940^2 .

It is a cyclic number.

It is not a de Polignac number, because 356424066649969 - 2¹ = 356424066649967 is a prime.

It is a super-2 number, since 2×356424066649969² (a number of 30 digits) contains 22 as substring.

Together with 356424066649967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (356424066649967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178212033324984 + 178212033324985.

It is an arithmetic number, because the mean of its divisors is an integer number (178212033324985).

Almost surely, 2^{356424066649969} is an apocalyptic number.

It is an amenable number.

356424066649969 is a deficient number, since it is larger than the sum of its proper divisors (1).

356424066649969 is an equidigital number, since it uses as much as digits as its factorization.

356424066649969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10883911680, while the sum is 79.

The spelling of 356424066649969 in words is "three hundred fifty-six trillion, four hundred twenty-four billion, sixty-six million, six hundred forty-nine thousand, nine hundred sixty-nine".