164000778 has 32 divisors (see below), whose sum is σ = 334129536. Its totient is φ = 53653248.

The previous prime is 164000777. The next prime is 164000783. The reversal of 164000778 is 877000461.

It is not an unprimeable number, because it can be changed into a prime (164000777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101251 + ... + 102857.

It is an arithmetic number, because the mean of its divisors is an integer number (10441548).

Almost surely, 2^164000778 is an apocalyptic number.

164000778 is an abundant number, since it is smaller than the sum of its proper divisors (170128758).

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

164000778 is a wasteful number, since it uses less digits than its factorization.

164000778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 164000778 is about 12806.2788506264. The cubic root of 164000778 is about 547.3712330357.

The spelling of 164000778 in words is "one hundred sixty-four million, seven hundred seventy-eight", and thus it is an aban number.