155144420115 has 16 divisors (see below), whose sum is σ = 248238259200. Its totient is φ = 82741295072.

The previous prime is 155144420113. The next prime is 155144420149. The reversal of 155144420115 is 511024441551.

It is a cyclic number.

It is not a de Polignac number, because 155144420115 - 2¹ = 155144420113 is a prime.

It is a super-2 number, since 2×155144420115² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155144420113) 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, 467776 + ... + 727394.

It is an arithmetic number, because the mean of its divisors is an integer number (15514891200).

Almost surely, 2^155144420115 is an apocalyptic number.

155144420115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155144420115 is a deficient number, since it is larger than the sum of its proper divisors (93093839085).

155144420115 is a wasteful number, since it uses less digits than its factorization.

155144420115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299466.

The product of its (nonzero) digits is 16000, while the sum is 33.

Adding to 155144420115 its reverse (511024441551), we get a palindrome (666168861666).

The spelling of 155144420115 in words is "one hundred fifty-five billion, one hundred forty-four million, four hundred twenty thousand, one hundred fifteen".