19628561525 has 24 divisors (see below), whose sum is σ = 24919134240. Its totient is φ = 15329240640.

The previous prime is 19628561479. The next prime is 19628561569. The reversal of 19628561525 is 52516582691.

It is a happy number.

It is not a de Polignac number, because 19628561525 - 2¹⁴ = 19628545141 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2564354 + ... + 2571996.

It is an arithmetic number, because the mean of its divisors is an integer number (1038297260).

Almost surely, 2^19628561525 is an apocalyptic number.

It is an amenable number.

19628561525 is a deficient number, since it is larger than the sum of its proper divisors (5290572715).

19628561525 is a wasteful number, since it uses less digits than its factorization.

19628561525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10085 (or 10080 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 50.

The spelling of 19628561525 in words is "nineteen billion, six hundred twenty-eight million, five hundred sixty-one thousand, five hundred twenty-five".