155343343551 has 16 divisors (see below), whose sum is σ = 233745471360. Its totient is φ = 90901015520.

The previous prime is 155343343541. The next prime is 155343343553.

155343343551 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 155343343551 - 2²² = 155339149247 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155343343553) 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, 81160665 + ... + 81162578.

It is an arithmetic number, because the mean of its divisors is an integer number (14609091960).

Almost surely, 2^155343343551 is an apocalyptic number.

155343343551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155343343551 is a deficient number, since it is larger than the sum of its proper divisors (78402127809).

155343343551 is a wasteful number, since it uses less digits than its factorization.

155343343551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162323286.

The product of its digits is 810000, while the sum is 42.

It can be divided in two parts, 155343 and 343551, that added together give a palindrome (498894).

The spelling of 155343343551 in words is "one hundred fifty-five billion, three hundred forty-three million, three hundred forty-three thousand, five hundred fifty-one".