120136111578 has 64 divisors (see below), whose sum is σ = 314949795840. Its totient is φ = 33217354800.

The previous prime is 120136111561. The next prime is 120136111597. The reversal of 120136111578 is 875111631021.

It is a happy number.

120136111578 is a `hidden beast` number, since 1 + 2 + 0 + 13 + 61 + 11 + 578 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5114418 + ... + 5137853.

It is an arithmetic number, because the mean of its divisors is an integer number (4921090560).

Almost surely, 2^120136111578 is an apocalyptic number.

120136111578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

120136111578 is an abundant number, since it is smaller than the sum of its proper divisors (194813684262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120136111578 is a wasteful number, since it uses less digits than its factorization.

120136111578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10252320 (or 10252314 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

Adding to 120136111578 its reverse (875111631021), we get a palindrome (995247742599).

The spelling of 120136111578 in words is "one hundred twenty billion, one hundred thirty-six million, one hundred eleven thousand, five hundred seventy-eight".