118742957281 has 15 divisors (see below), whose sum is σ = 128700976901. Its totient is φ = 109555127448.

The previous prime is 118742957243. The next prime is 118742957309. The reversal of 118742957281 is 182759247811.

The square root of 118742957281 is 344591.

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

It can be written as a sum of positive squares in 2 ways, for example, as 58874654881 + 59868302400 = 242641^2 + 244680^2 .

It is not a de Polignac number, because 118742957281 - 2²⁷ = 118608739553 is a prime.

It is a super-2 number, since 2×118742957281² (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 (118742957381) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 58234860 + ... + 58236898.

Almost surely, 2^118742957281 is an apocalyptic number.

118742957281 is the 344591-st square number.

118742957281 is the 172296-th centered octagonal number.

It is an amenable number.

118742957281 is a deficient number, since it is larger than the sum of its proper divisors (9958019620).

118742957281 is an frugal number, since it uses more digits than its factorization.

118742957281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4130 (or 2052 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 55.

The spelling of 118742957281 in words is "one hundred eighteen billion, seven hundred forty-two million, nine hundred fifty-seven thousand, two hundred eighty-one".