1968849481 has 4 divisors (see below), whose sum is σ = 2001125764. Its totient is φ = 1936573200.

The previous prime is 1968849457. The next prime is 1968849563. The reversal of 1968849481 is 1849488691.

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 820249600 + 1148599881 = 28640^2 + 33891^2 .

It is a cyclic number.

It is not a de Polignac number, because 1968849481 - 2¹⁵ = 1968816713 is a prime.

It is a super-2 number, since 2×1968849481² = 7752736557667938722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1968849581) 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, 16138050 + ... + 16138171.

It is an arithmetic number, because the mean of its divisors is an integer number (500281441).

Almost surely, 2^1968849481 is an apocalyptic number.

It is an amenable number.

1968849481 is a deficient number, since it is larger than the sum of its proper divisors (32276283).

1968849481 is an equidigital number, since it uses as much as digits as its factorization.

1968849481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32276282.

The product of its digits is 3981312, while the sum is 58.

The square root of 1968849481 is about 44371.7193829583. The cubic root of 1968849481 is about 1253.3455935609.

It can be divided in two parts, 19688 and 49481, that added together give a square (69169 = 263²).

The spelling of 1968849481 in words is "one billion, nine hundred sixty-eight million, eight hundred forty-nine thousand, four hundred eighty-one".