118279678521 has 16 divisors (see below), whose sum is σ = 158975974080. Its totient is φ = 78219216960.

The previous prime is 118279678507. The next prime is 118279678523. The reversal of 118279678521 is 125876972811.

It is a happy number.

It is not a de Polignac number, because 118279678521 - 2¹⁰ = 118279677497 is a prime.

It is a super-2 number, since 2×118279678521² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (118279678523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 372391 + ... + 612563.

It is an arithmetic number, because the mean of its divisors is an integer number (9935998380).

Almost surely, 2^118279678521 is an apocalyptic number.

It is an amenable number.

118279678521 is a deficient number, since it is larger than the sum of its proper divisors (40696295559).

118279678521 is a wasteful number, since it uses less digits than its factorization.

118279678521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241496.

The product of its digits is 3386880, while the sum is 57.

The spelling of 118279678521 in words is "one hundred eighteen billion, two hundred seventy-nine million, six hundred seventy-eight thousand, five hundred twenty-one".