155342243551 has 16 divisors (see below), whose sum is σ = 169841903616. Its totient is φ = 140905800000.

The previous prime is 155342243549. The next prime is 155342243587.

155342243551 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 155342243551 - 2¹ = 155342243549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155342246551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13950256 + ... + 13961386.

It is an arithmetic number, because the mean of its divisors is an integer number (10615118976).

Almost surely, 2^155342243551 is an apocalyptic number.

155342243551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155342243551 is a deficient number, since it is larger than the sum of its proper divisors (14499660065).

155342243551 is a wasteful number, since it uses less digits than its factorization.

155342243551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13854.

The product of its digits is 360000, while the sum is 40.

It can be divided in two parts, 155342 and 243551, that added together give a palindrome (398893).

The spelling of 155342243551 in words is "one hundred fifty-five billion, three hundred forty-two million, two hundred forty-three thousand, five hundred fifty-one".