1572991655432 has 12 divisors (see below), whose sum is σ = 2949366005295. Its totient is φ = 786494054024.

The previous prime is 1572991655429. The next prime is 1572991655437. The reversal of 1572991655432 is 2345561992751.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 786495827716 + 786495827716 = 886846^2 + 886846^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=886846.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1572991655437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3325673 + ... + 3769095.

Almost surely, 2^{1572991655432} is an apocalyptic number.

It is an amenable number.

1572991655432 is a deficient number, since it is larger than the sum of its proper divisors (1376374349863).

1572991655432 is an frugal number, since it uses more digits than its factorization.

1572991655432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886852 (or 443425 counting only the distinct ones).

The product of its digits is 20412000, while the sum is 59.

The spelling of 1572991655432 in words is "one trillion, five hundred seventy-two billion, nine hundred ninety-one million, six hundred fifty-five thousand, four hundred thirty-two".