118916694649 has 3 divisors (see below), whose sum is σ = 118917039493. Its totient is φ = 118916349806.

The previous prime is 118916694643. The next prime is 118916694683. The reversal of 118916694649 is 946496619811.

The square root of 118916694649 is 344843.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 946496619811 = 19 ⋅49815611569.

It is not a de Polignac number, because 118916694649 - 2¹³ = 118916686457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118916694643) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 172422 + ... + 517264.

Almost surely, 2^118916694649 is an apocalyptic number.

118916694649 is the 344843-rd square number.

118916694649 is the 172422-nd centered octagonal number.

It is an amenable number.

118916694649 is a deficient number, since it is larger than the sum of its proper divisors (344844).

118916694649 is an frugal number, since it uses more digits than its factorization.

118916694649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689686 (or 344843 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 64.

Multiplying 118916694649 by its sum of digits (64), we get a square (7610668457536 = 2758744²).

The spelling of 118916694649 in words is "one hundred eighteen billion, nine hundred sixteen million, six hundred ninety-four thousand, six hundred forty-nine".