1968519425 has 12 divisors (see below), whose sum is σ = 2455079100. Its totient is φ = 1565709120.

The previous prime is 1968519409. The next prime is 1968519433. The reversal of 1968519425 is 5249158691.

It is a Cunningham number, because it is equal to 44368²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 1 + 1968519424 = 1^2 + 44368^2 .

It is not a de Polignac number, because 1968519425 - 2⁴ = 1968519409 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 223250 + ... + 231899.

It is an arithmetic number, because the mean of its divisors is an integer number (204589925).

Almost surely, 2^1968519425 is an apocalyptic number.

It is an amenable number.

1968519425 is a deficient number, since it is larger than the sum of its proper divisors (486559675).

1968519425 is a wasteful number, since it uses less digits than its factorization.

1968519425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455332 (or 455327 counting only the distinct ones).

The product of its digits is 777600, while the sum is 50.

The square root of 1968519425 is about 44368.0000112694. Note that the first 4 decimals coincide. The cubic root of 1968519425 is about 1253.2755531041.

The spelling of 1968519425 in words is "one billion, nine hundred sixty-eight million, five hundred nineteen thousand, four hundred twenty-five".