19606440529 has 9 divisors (see below), whose sum is σ = 21232613979. Its totient is φ = 18096572520.

The previous prime is 19606440517. The next prime is 19606440583. The reversal of 19606440529 is 92504460691.

The square root of 19606440529 is 140023.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2900361025 + 16706079504 = 53855^2 + 129252^2 .

It is not a de Polignac number, because 19606440529 - 2¹³ = 19606432337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19606449529) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1814914 + ... + 1825684.

It is an arithmetic number, because the mean of its divisors is an integer number (2359179331).

Almost surely, 2^19606440529 is an apocalyptic number.

19606440529 is the 140023-rd square number.

19606440529 is the 70012-nd centered octagonal number.

It is an amenable number.

19606440529 is a deficient number, since it is larger than the sum of its proper divisors (1626173450).

19606440529 is an frugal number, since it uses more digits than its factorization.

19606440529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21568 (or 10784 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 19606440529 in words is "nineteen billion, six hundred six million, four hundred forty thousand, five hundred twenty-nine".