1996964845 has 4 divisors (see below), whose sum is σ = 2396357820. Its totient is φ = 1597571872.

The previous prime is 1996964843. The next prime is 1996964873. The reversal of 1996964845 is 5484696991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 442555369 + 1554409476 = 21037^2 + 39426^2 .

It is a cyclic number.

It is not a de Polignac number, because 1996964845 - 2¹ = 1996964843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1996964843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199696480 + ... + 199696489.

It is an arithmetic number, because the mean of its divisors is an integer number (599089455).

Almost surely, 2^1996964845 is an apocalyptic number.

It is an amenable number.

1996964845 is a deficient number, since it is larger than the sum of its proper divisors (399392975).

1996964845 is an equidigital number, since it uses as much as digits as its factorization.

1996964845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399392974.

The product of its digits is 16796160, while the sum is 61.

The square root of 1996964845 is about 44687.4126013131. The cubic root of 1996964845 is about 1259.2833846048.

The spelling of 1996964845 in words is "one billion, nine hundred ninety-six million, nine hundred sixty-four thousand, eight hundred forty-five".