155533222335551 has 2 divisors, whose sum is σ = 155533222335552. Its totient is φ = 155533222335550.

The previous prime is 155533222335541. The next prime is 155533222335583.

155533222335551 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 155533222335551 - 2¹⁰ = 155533222334527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155533222335551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155533222335521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77766611167775 + 77766611167776.

It is an arithmetic number, because the mean of its divisors is an integer number (77766611167776).

Almost surely, 2^{155533222335551} is an apocalyptic number.

155533222335551 is a deficient number, since it is larger than the sum of its proper divisors (1).

155533222335551 is an equidigital number, since it uses as much as digits as its factorization.

155533222335551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10125000, while the sum is 50.

The spelling of 155533222335551 in words is "one hundred fifty-five trillion, five hundred thirty-three billion, two hundred twenty-two million, three hundred thirty-five thousand, five hundred fifty-one".