355555161555554 has 4 divisors (see below), whose sum is σ = 533332742333334. Its totient is φ = 177777580777776.

The previous prime is 355555161555553. The next prime is 355555161555563. The reversal of 355555161555554 is 455555161555553.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 343929005174329 + 11626156381225 = 18545323^2 + 3409715^2 .

It is a super-2 number, since 2×355555161555554² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (355555161555553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 88888790388887 + ... + 88888790388890.

Almost surely, 2^{355555161555554} is an apocalyptic number.

355555161555554 is a deficient number, since it is larger than the sum of its proper divisors (177777580777780).

355555161555554 is a wasteful number, since it uses less digits than its factorization.

355555161555554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177777580777779.

The product of its digits is 703125000, while the sum is 65.

Subtracting 355555161555554 from its reverse (455555161555553), we obtain a palindrome (99999999999999).

The spelling of 355555161555554 in words is "three hundred fifty-five trillion, five hundred fifty-five billion, one hundred sixty-one million, five hundred fifty-five thousand, five hundred fifty-four".