155553355551 has 16 divisors (see below), whose sum is σ = 226763366400. Its totient is φ = 94064785920.

The previous prime is 155553355537. The next prime is 155553355589.

155553355551 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 155553355551 - 2⁷ = 155553355423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155553355551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155553355051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5234335 + ... + 5263968.

It is an arithmetic number, because the mean of its divisors is an integer number (14172710400).

Almost surely, 2^155553355551 is an apocalyptic number.

155553355551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155553355551 is a deficient number, since it is larger than the sum of its proper divisors (71210010849).

155553355551 is a wasteful number, since it uses less digits than its factorization.

155553355551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10498766.

The product of its digits is 3515625, while the sum is 48.

The spelling of 155553355551 in words is "one hundred fifty-five billion, five hundred fifty-three million, three hundred fifty-five thousand, five hundred fifty-one".