355357653421 has 2 divisors, whose sum is σ = 355357653422. Its totient is φ = 355357653420.

The previous prime is 355357653407. The next prime is 355357653437. The reversal of 355357653421 is 124356753553.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198176328900 + 157181324521 = 445170^2 + 396461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-355357653421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (355357653401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177678826710 + 177678826711.

It is an arithmetic number, because the mean of its divisors is an integer number (177678826711).

Almost surely, 2^355357653421 is an apocalyptic number.

It is an amenable number.

355357653421 is a deficient number, since it is larger than the sum of its proper divisors (1).

355357653421 is an equidigital number, since it uses as much as digits as its factorization.

355357653421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5670000, while the sum is 49.

The spelling of 355357653421 in words is "three hundred fifty-five billion, three hundred fifty-seven million, six hundred fifty-three thousand, four hundred twenty-one".