1956046489 has 4 divisors (see below), whose sum is σ = 1957203556. Its totient is φ = 1954889424.

The previous prime is 1956046487. The next prime is 1956046513. The reversal of 1956046489 is 9846406591.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9846406591 = 7 ⋅1406629513.

It can be written as a sum of positive squares in 2 ways, for example, as 1012512400 + 943534089 = 31820^2 + 30717^2 .

It is a cyclic number.

It is not a de Polignac number, because 1956046489 - 2¹ = 1956046487 is a prime.

It is a super-2 number, since 2×1956046489² = 7652235734258454242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1956046483) 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 3 ways as a sum of consecutive naturals, for example, 575994 + ... + 579379.

It is an arithmetic number, because the mean of its divisors is an integer number (489300889).

Almost surely, 2^1956046489 is an apocalyptic number.

It is an amenable number.

1956046489 is a deficient number, since it is larger than the sum of its proper divisors (1157067).

1956046489 is a wasteful number, since it uses less digits than its factorization.

1956046489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157066.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 1956046489 is about 44227.2143481816. The cubic root of 1956046489 is about 1250.6229404912.

It can be divided in two parts, 19560 and 46489, that added together give a square (66049 = 257²).

The spelling of 1956046489 in words is "one billion, nine hundred fifty-six million, forty-six thousand, four hundred eighty-nine".