1964345538 has 8 divisors (see below), whose sum is σ = 3928691088. Its totient is φ = 654781844.

The previous prime is 1964345531. The next prime is 1964345549. The reversal of 1964345538 is 8355434691.

It is a sphenic number, since it is the product of 3 distinct primes.

1964345538 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1964345531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163695456 + ... + 163695467.

It is an arithmetic number, because the mean of its divisors is an integer number (491086386).

Almost surely, 2^1964345538 is an apocalyptic number.

1964345538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1964345538 is a wasteful number, since it uses less digits than its factorization.

1964345538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327390928.

The product of its digits is 1555200, while the sum is 48.

The square root of 1964345538 is about 44320.9379187760. The cubic root of 1964345538 is about 1252.3891454513.

The spelling of 1964345538 in words is "one billion, nine hundred sixty-four million, three hundred forty-five thousand, five hundred thirty-eight".