19779461425 has 12 divisors (see below), whose sum is σ = 25096918000. Its totient is φ = 15455578320.

The previous prime is 19779461419. The next prime is 19779461459. The reversal of 19779461425 is 52416497791.

It is not a de Polignac number, because 19779461425 - 2³ = 19779461417 is a prime.

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, 9198675 + ... + 9200824.

Almost surely, 2^19779461425 is an apocalyptic number.

It is an amenable number.

19779461425 is a deficient number, since it is larger than the sum of its proper divisors (5317456575).

19779461425 is a wasteful number, since it uses less digits than its factorization.

19779461425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18399552 (or 18399547 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 55.

The spelling of 19779461425 in words is "nineteen billion, seven hundred seventy-nine million, four hundred sixty-one thousand, four hundred twenty-five".