118209537861 has 8 divisors (see below), whose sum is σ = 157616288064. Its totient is φ = 78804573120.

The previous prime is 118209537839. The next prime is 118209537863. The reversal of 118209537861 is 168735902811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 118209537861 - 2¹¹ = 118209535813 is a prime.

It is a super-2 number, since 2×118209537861² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118209537863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283380 + ... + 562781.

It is an arithmetic number, because the mean of its divisors is an integer number (19702036008).

Almost surely, 2^118209537861 is an apocalyptic number.

It is an amenable number.

118209537861 is a deficient number, since it is larger than the sum of its proper divisors (39406750203).

118209537861 is an equidigital number, since it uses as much as digits as its factorization.

118209537861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892731.

The product of its (nonzero) digits is 725760, while the sum is 51.

The spelling of 118209537861 in words is "one hundred eighteen billion, two hundred nine million, five hundred thirty-seven thousand, eight hundred sixty-one".