355539448981 has 2 divisors, whose sum is σ = 355539448982. Its totient is φ = 355539448980.

The previous prime is 355539448951. The next prime is 355539448993. The reversal of 355539448981 is 189844935553.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 326194045956 + 29345403025 = 571134^2 + 171305^2 .

It is a cyclic number.

It is not a de Polignac number, because 355539448981 - 2⁵ = 355539448949 is a prime.

It is a super-2 number, since 2×355539448981² (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 (355539448951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177769724490 + 177769724491.

It is an arithmetic number, because the mean of its divisors is an integer number (177769724491).

Almost surely, 2^355539448981 is an apocalyptic number.

It is an amenable number.

355539448981 is a deficient number, since it is larger than the sum of its proper divisors (1).

355539448981 is an equidigital number, since it uses as much as digits as its factorization.

355539448981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312000, while the sum is 64.

The spelling of 355539448981 in words is "three hundred fifty-five billion, five hundred thirty-nine million, four hundred forty-eight thousand, nine hundred eighty-one".