19528046661 has 64 divisors (see below), whose sum is σ = 28426567680. Its totient is φ = 11891996160.

The previous prime is 19528046653. The next prime is 19528046687. The reversal of 19528046661 is 16664082591.

It is not a de Polignac number, because 19528046661 - 2³ = 19528046653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19528046661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19528046561) 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 63 ways as a sum of consecutive naturals, for example, 50986876 + ... + 50987258.

It is an arithmetic number, because the mean of its divisors is an integer number (444165120).

Almost surely, 2^19528046661 is an apocalyptic number.

It is an amenable number.

19528046661 is a deficient number, since it is larger than the sum of its proper divisors (8898521019).

19528046661 is a wasteful number, since it uses less digits than its factorization.

19528046661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786.

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 19528046661 in words is "nineteen billion, five hundred twenty-eight million, forty-six thousand, six hundred sixty-one".