1964644158 has 32 divisors (see below), whose sum is σ = 4062892032. Its totient is φ = 632685600.

The previous prime is 1964644139. The next prime is 1964644159. The reversal of 1964644158 is 8514464691.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1964644159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105403 + ... + 122633.

It is an arithmetic number, because the mean of its divisors is an integer number (126965376).

Almost surely, 2^1964644158 is an apocalyptic number.

1964644158 is an abundant number, since it is smaller than the sum of its proper divisors (2098247874).

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

1964644158 is a wasteful number, since it uses less digits than its factorization.

1964644158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17880.

The product of its digits is 829440, while the sum is 48.

The square root of 1964644158 is about 44324.3066274025. The cubic root of 1964644158 is about 1252.4526050089.

The spelling of 1964644158 in words is "one billion, nine hundred sixty-four million, six hundred forty-four thousand, one hundred fifty-eight".