155144441551 has 4 divisors (see below), whose sum is σ = 169248481704. Its totient is φ = 141040401400.

The previous prime is 155144441531. The next prime is 155144441603.

155144441551 is nontrivially palindromic in base 10.

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 155144441551 - 2¹⁹ = 155143917263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155144441531) 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, 7052020060 + ... + 7052020081.

It is an arithmetic number, because the mean of its divisors is an integer number (42312120426).

Almost surely, 2^155144441551 is an apocalyptic number.

155144441551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155144441551 is a deficient number, since it is larger than the sum of its proper divisors (14104040153).

155144441551 is a wasteful number, since it uses less digits than its factorization.

155144441551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14104040152.

The product of its digits is 160000, while the sum is 40.

It can be divided in two parts, 155144 and 441551, that added together give a palindrome (596695).

The spelling of 155144441551 in words is "one hundred fifty-five billion, one hundred forty-four million, four hundred forty-one thousand, five hundred fifty-one".