355134454621 has 2 divisors, whose sum is σ = 355134454622. Its totient is φ = 355134454620.

The previous prime is 355134454589. The next prime is 355134454651. The reversal of 355134454621 is 126454431553.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344350670596 + 10783784025 = 586814^2 + 103845^2 .

It is a cyclic number.

It is not a de Polignac number, because 355134454621 - 2⁵ = 355134454589 is a prime.

It is a super-2 number, since 2×355134454621² (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 (355134454651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177567227310 + 177567227311.

It is an arithmetic number, because the mean of its divisors is an integer number (177567227311).

Almost surely, 2^355134454621 is an apocalyptic number.

It is an amenable number.

355134454621 is a deficient number, since it is larger than the sum of its proper divisors (1).

355134454621 is an equidigital number, since it uses as much as digits as its factorization.

355134454621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864000, while the sum is 43.

The spelling of 355134454621 in words is "three hundred fifty-five billion, one hundred thirty-four million, four hundred fifty-four thousand, six hundred twenty-one".