118444040649 has 27 divisors (see below), whose sum is σ = 188071060359. Its totient is φ = 71777383920.

The previous prime is 118444040621. The next prime is 118444040651. The reversal of 118444040649 is 946040444811.

It is a happy number.

The square root of 118444040649 is 344157.

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

118444040649 is a `hidden beast` number, since 1 + 184 + 4 + 404 + 0 + 64 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 117311045049 + 1132995600 = 342507^2 + 33660^2 .

It is not a de Polignac number, because 118444040649 - 2⁹ = 118444040137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118444040609) 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, 11351967 + ... + 11362395.

Almost surely, 2^118444040649 is an apocalyptic number.

118444040649 is the 344157-th square number.

118444040649 is the 172079-th centered octagonal number.

It is an amenable number.

118444040649 is a deficient number, since it is larger than the sum of its proper divisors (69627019710).

118444040649 is an frugal number, since it uses more digits than its factorization.

118444040649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20886 (or 10443 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 118444040649 in words is "one hundred eighteen billion, four hundred forty-four million, forty thousand, six hundred forty-nine".