155716262881 has 9 divisors (see below), whose sum is σ = 158335312473. Its totient is φ = 153139860720.

The previous prime is 155716262857. The next prime is 155716262893. The reversal of 155716262881 is 188262617551.

It is a happy number.

The square root of 155716262881 is 394609.

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

It can be written as a sum of positive squares in 4 ways, for example, as 130928909281 + 24787353600 = 361841^2 + 157440^2 .

It is not a de Polignac number, because 155716262881 - 2³³ = 147126328289 is a prime.

It is a super-2 number, since 2×155716262881² (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 (155716262981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 24067915 + ... + 24074383.

It is an arithmetic number, because the mean of its divisors is an integer number (17592812497).

Almost surely, 2^155716262881 is an apocalyptic number.

155716262881 is the 394609-th square number.

155716262881 is the 197305-th centered octagonal number.

It is an amenable number.

155716262881 is a deficient number, since it is larger than the sum of its proper divisors (2619049592).

155716262881 is an frugal number, since it uses more digits than its factorization.

155716262881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13060 (or 6530 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 52.

The spelling of 155716262881 in words is "one hundred fifty-five billion, seven hundred sixteen million, two hundred sixty-two thousand, eight hundred eighty-one".