164291978 has 16 divisors (see below), whose sum is σ = 266488704. Its totient is φ = 75668160.

The previous prime is 164291977. The next prime is 164291983. The reversal of 164291978 is 879192461.

164291978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (164291977) 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, 49808 + ... + 53003.

It is an arithmetic number, because the mean of its divisors is an integer number (16655544).

Almost surely, 2^164291978 is an apocalyptic number.

164291978 is a deficient number, since it is larger than the sum of its proper divisors (102196726).

164291978 is a wasteful number, since it uses less digits than its factorization.

164291978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102877.

The product of its digits is 217728, while the sum is 47.

The square root of 164291978 is about 12817.6432311092. The cubic root of 164291978 is about 547.6950125071.

The spelling of 164291978 in words is "one hundred sixty-four million, two hundred ninety-one thousand, nine hundred seventy-eight".