155551155008559 has 4 divisors (see below), whose sum is σ = 207401540011416. Its totient is φ = 103700770005704.

The previous prime is 155551155008551. The next prime is 155551155008563. The reversal of 155551155008559 is 955800551155551.

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

It is a cyclic number.

It is not a de Polignac number, because 155551155008559 - 2³ = 155551155008551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155551155008551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25925192501424 + ... + 25925192501429.

It is an arithmetic number, because the mean of its divisors is an integer number (51850385002854).

Almost surely, 2^{155551155008559} is an apocalyptic number.

155551155008559 is a deficient number, since it is larger than the sum of its proper divisors (51850385002857).

155551155008559 is an equidigital number, since it uses as much as digits as its factorization.

155551155008559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51850385002856.

The product of its (nonzero) digits is 28125000, while the sum is 60.

The spelling of 155551155008559 in words is "one hundred fifty-five trillion, five hundred fifty-one billion, one hundred fifty-five million, eight thousand, five hundred fifty-nine".