155347127881 has 9 divisors (see below), whose sum is σ = 170758220269. Its totient is φ = 141220720300.

The previous prime is 155347127879. The next prime is 155347127893. The reversal of 155347127881 is 188721743551.

The square root of 155347127881 is 394141.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 155347127881 - 2¹ = 155347127879 is a prime.

It is a super-2 number, since 2×155347127881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155347127861) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4317636 + ... + 4353466.

Almost surely, 2^155347127881 is an apocalyptic number.

155347127881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155347127881 is the 394141-st square number.

155347127881 is the 197071-st centered octagonal number.

It is an amenable number.

155347127881 is a deficient number, since it is larger than the sum of its proper divisors (15411092388).

155347127881 is an frugal number, since it uses more digits than its factorization.

155347127881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71684 (or 35842 counting only the distinct ones).

The product of its digits is 1881600, while the sum is 52.

The spelling of 155347127881 in words is "one hundred fifty-five billion, three hundred forty-seven million, one hundred twenty-seven thousand, eight hundred eighty-one".