118701609961 has 9 divisors (see below), whose sum is σ = 130477836279. Its totient is φ = 107907109200.

The previous prime is 118701609953. The next prime is 118701609967. The reversal of 118701609961 is 169906107811.

The square root of 118701609961 is 344531.

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., 64729027561 + 53972582400 = 254419^2 + 232320^2 .

It is not a de Polignac number, because 118701609961 - 2³ = 118701609953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118701609967) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3774181 + ... + 3805501.

Almost surely, 2^118701609961 is an apocalyptic number.

118701609961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

118701609961 is the 344531-st square number.

118701609961 is the 172266-th centered octagonal number.

It is an amenable number.

118701609961 is a deficient number, since it is larger than the sum of its proper divisors (11776226318).

118701609961 is an frugal number, since it uses more digits than its factorization.

118701609961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62664 (or 31332 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 49.

Multiplying 118701609961 by its sum of digits (49), we get a square (5816378888089 = 2411717²).

The spelling of 118701609961 in words is "one hundred eighteen billion, seven hundred one million, six hundred nine thousand, nine hundred sixty-one".