51155606178 has 24 divisors (see below), whose sum is σ = 110869983900. Its totient is φ = 17046816864.

The previous prime is 51155606171. The next prime is 51155606189. The reversal of 51155606178 is 87160655115.

It is a happy number.

51155606178 is a `hidden beast` number, since 5 + 1 + 15 + 560 + 6 + 1 + 78 = 666.

51155606178 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 51110809929 + 44796249 = 226077^2 + 6693^2 .

It is not an unprimeable number, because it can be changed into a prime (51155606171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 358293 + ... + 480296.

Almost surely, 2^51155606178 is an apocalyptic number.

51155606178 is an abundant number, since it is smaller than the sum of its proper divisors (59714377722).

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

51155606178 is a wasteful number, since it uses less digits than its factorization.

51155606178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841986 (or 841983 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 45.

The spelling of 51155606178 in words is "fifty-one billion, one hundred fifty-five million, six hundred six thousand, one hundred seventy-eight".