155424243551 has 4 divisors (see below), whose sum is σ = 155457882504. Its totient is φ = 155390604600.

The previous prime is 155424243539. The next prime is 155424243589. The reversal of 155424243551 is 155342424551.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155342424551 = 51481 ⋅3017471.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155424243551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155424243499 and 155424243508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155424243511) 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, 16812545 + ... + 16821786.

It is an arithmetic number, because the mean of its divisors is an integer number (38864470626).

Almost surely, 2^155424243551 is an apocalyptic number.

155424243551 is a deficient number, since it is larger than the sum of its proper divisors (33638953).

155424243551 is an equidigital number, since it uses as much as digits as its factorization.

155424243551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33638952.

The product of its digits is 480000, while the sum is 41.

The spelling of 155424243551 in words is "one hundred fifty-five billion, four hundred twenty-four million, two hundred forty-three thousand, five hundred fifty-one".