1964548813 has 4 divisors (see below), whose sum is σ = 1974521340. Its totient is φ = 1954576288.

The previous prime is 1964548811. The next prime is 1964548819. The reversal of 1964548813 is 3188454691.

It is a happy number.

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 1710401449 + 254147364 = 41357^2 + 15942^2 .

It is a cyclic number.

It is not a de Polignac number, because 1964548813 - 2¹ = 1964548811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1964548811) 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, 4985968 + ... + 4986361.

It is an arithmetic number, because the mean of its divisors is an integer number (493630335).

Almost surely, 2^1964548813 is an apocalyptic number.

It is an amenable number.

1964548813 is a deficient number, since it is larger than the sum of its proper divisors (9972527).

1964548813 is an equidigital number, since it uses as much as digits as its factorization.

1964548813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9972526.

The product of its digits is 829440, while the sum is 49.

The square root of 1964548813 is about 44323.2310758140. The cubic root of 1964548813 is about 1252.4323439988.

The spelling of 1964548813 in words is "one billion, nine hundred sixty-four million, five hundred forty-eight thousand, eight hundred thirteen".