156108978 has 64 divisors (see below), whose sum is σ = 370483200. Its totient is φ = 48580560.

The previous prime is 156108971. The next prime is 156108989. The reversal of 156108978 is 879801651.

156108978 is a `hidden beast` number, since 1 + 561 + 0 + 89 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (156108971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71775 + ... + 73917.

It is an arithmetic number, because the mean of its divisors is an integer number (5788800).

Almost surely, 2^156108978 is an apocalyptic number.

156108978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 156108978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185241600).

156108978 is an abundant number, since it is smaller than the sum of its proper divisors (214374222).

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

156108978 is a wasteful number, since it uses less digits than its factorization.

156108978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244 (or 2238 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 156108978 is about 12494.3578466442. The cubic root of 156108978 is about 538.4465849673.

The spelling of 156108978 in words is "one hundred fifty-six million, one hundred eight thousand, nine hundred seventy-eight".