118548687481 has 27 divisors (see below), whose sum is σ = 139569064047. Its totient is φ = 100400504400.

The previous prime is 118548687473. The next prime is 118548687511. The reversal of 118548687481 is 184786845811.

The square root of 118548687481 is 344309.

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

It can be written as a sum of positive squares in only one way, i.e., 113900175081 + 4648512400 = 337491^2 + 68180^2 .

It is not a de Polignac number, because 118548687481 - 2³ = 118548687473 is a prime.

It is a super-2 number, since 2×118548687481² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (118548687421) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 243426220 + ... + 243426706.

Almost surely, 2^118548687481 is an apocalyptic number.

118548687481 is the 344309-th square number.

118548687481 is the 172155-th centered octagonal number.

It is an amenable number.

118548687481 is a deficient number, since it is larger than the sum of its proper divisors (21020376566).

118548687481 is an frugal number, since it uses more digits than its factorization.

118548687481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190 (or 595 counting only the distinct ones).

The product of its digits is 13762560, while the sum is 61.

The spelling of 118548687481 in words is "one hundred eighteen billion, five hundred forty-eight million, six hundred eighty-seven thousand, four hundred eighty-one".