356112939489521 has 2 divisors, whose sum is σ = 356112939489522. Its totient is φ = 356112939489520.

The previous prime is 356112939489479. The next prime is 356112939489523. The reversal of 356112939489521 is 125984939211653.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189558815297296 + 166554124192225 = 13768036^2 + 12905585^2 .

It is an emirp because it is prime and its reverse (125984939211653) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 356112939489521 - 2⁶ = 356112939489457 is a prime.

Together with 356112939489523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (356112939489523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178056469744760 + 178056469744761.

It is an arithmetic number, because the mean of its divisors is an integer number (178056469744761).

Almost surely, 2^{356112939489521} is an apocalyptic number.

It is an amenable number.

356112939489521 is a deficient number, since it is larger than the sum of its proper divisors (1).

356112939489521 is an equidigital number, since it uses as much as digits as its factorization.

356112939489521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125971200, while the sum is 68.

The spelling of 356112939489521 in words is "three hundred fifty-six trillion, one hundred twelve billion, nine hundred thirty-nine million, four hundred eighty-nine thousand, five hundred twenty-one".