155455505554551 has 16 divisors (see below), whose sum is σ = 212879000373600. Its totient is φ = 100834585976448.

The previous prime is 155455505554523. The next prime is 155455505554579.

155455505554551 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (155455505554523) and next prime (155455505554579).

It is not a de Polignac number, because 155455505554551 - 2⁶ = 155455505554487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155455505556551) 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, 1884756 + ... + 17733113.

It is an arithmetic number, because the mean of its divisors is an integer number (13304937523350).

Almost surely, 2^{155455505554551} is an apocalyptic number.

155455505554551 is a deficient number, since it is larger than the sum of its proper divisors (57423494819049).

155455505554551 is a wasteful number, since it uses less digits than its factorization.

155455505554551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19689298.

The product of its (nonzero) digits is 156250000, while the sum is 60.

The spelling of 155455505554551 in words is "one hundred fifty-five trillion, four hundred fifty-five billion, five hundred five million, five hundred fifty-four thousand, five hundred fifty-one".