1509232555553 has 4 divisors (see below), whose sum is σ = 1550022624660. Its totient is φ = 1468442486448.

The previous prime is 1509232555541. The next prime is 1509232555673. The reversal of 1509232555553 is 3555552329051.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 543792680929 + 965439874624 = 737423^2 + 982568^2 .

It is a cyclic number.

It is not a de Polignac number, because 1509232555553 - 2³² = 1504937588257 is a prime.

It is a super-2 number, since 2×1509232555553² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1509232558553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20395034498 + ... + 20395034571.

It is an arithmetic number, because the mean of its divisors is an integer number (387505656165).

Almost surely, 2^{1509232555553} is an apocalyptic number.

It is an amenable number.

1509232555553 is a deficient number, since it is larger than the sum of its proper divisors (40790069107).

1509232555553 is an equidigital number, since it uses as much as digits as its factorization.

1509232555553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40790069106.

The product of its (nonzero) digits is 5062500, while the sum is 50.

The spelling of 1509232555553 in words is "one trillion, five hundred nine billion, two hundred thirty-two million, five hundred fifty-five thousand, five hundred fifty-three".