164153978 has 16 divisors (see below), whose sum is σ = 261609480. Its totient is φ = 77103936.

The previous prime is 164153971. The next prime is 164154031. The reversal of 164153978 is 879351461.

164153978 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 4 ways, for example, as 142874209 + 21279769 = 11953^2 + 4613^2 .

It is not an unprimeable number, because it can be changed into a prime (164153971) 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, 36101 + ... + 40392.

Almost surely, 2^164153978 is an apocalyptic number.

164153978 is a deficient number, since it is larger than the sum of its proper divisors (97455502).

164153978 is a wasteful number, since it uses less digits than its factorization.

164153978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76561.

The product of its digits is 181440, while the sum is 44.

The square root of 164153978 is about 12812.2588952924. The cubic root of 164153978 is about 547.5416207943.

The spelling of 164153978 in words is "one hundred sixty-four million, one hundred fifty-three thousand, nine hundred seventy-eight".