1956548813 has 4 divisors (see below), whose sum is σ = 1963226748. Its totient is φ = 1949870880.

The previous prime is 1956548779. The next prime is 1956548833. The reversal of 1956548813 is 3188456591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3188456591 = 29 ⋅109946779.

It can be written as a sum of positive squares in 2 ways, for example, as 1865116969 + 91431844 = 43187^2 + 9562^2 .

It is a cyclic number.

It is not a de Polignac number, because 1956548813 - 2²⁰ = 1955500237 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 (1956548833) 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, 3338528 + ... + 3339113.

It is an arithmetic number, because the mean of its divisors is an integer number (490806687).

Almost surely, 2^1956548813 is an apocalyptic number.

It is an amenable number.

1956548813 is a deficient number, since it is larger than the sum of its proper divisors (6677935).

1956548813 is an equidigital number, since it uses as much as digits as its factorization.

1956548813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6677934.

The product of its digits is 1036800, while the sum is 50.

The square root of 1956548813 is about 44232.8928852726. The cubic root of 1956548813 is about 1250.7299870521.

The spelling of 1956548813 in words is "one billion, nine hundred fifty-six million, five hundred forty-eight thousand, eight hundred thirteen".