118942425781 has 2 divisors, whose sum is σ = 118942425782. Its totient is φ = 118942425780.

The previous prime is 118942425757. The next prime is 118942425841. The reversal of 118942425781 is 187524249811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66581545156 + 52360880625 = 258034^2 + 228825^2 .

It is a cyclic number.

It is not a de Polignac number, because 118942425781 - 2¹⁵ = 118942393013 is a prime.

It is a super-2 number, since 2×118942425781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118942125781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59471212890 + 59471212891.

It is an arithmetic number, because the mean of its divisors is an integer number (59471212891).

Almost surely, 2^118942425781 is an apocalyptic number.

It is an amenable number.

118942425781 is a deficient number, since it is larger than the sum of its proper divisors (1).

118942425781 is an equidigital number, since it uses as much as digits as its factorization.

118942425781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1290240, while the sum is 52.

The spelling of 118942425781 in words is "one hundred eighteen billion, nine hundred forty-two million, four hundred twenty-five thousand, seven hundred eighty-one".