503145432654321 has 16 divisors (see below), whose sum is σ = 673938271090944. Its totient is φ = 333891978000144.

The previous prime is 503145432654299. The next prime is 503145432654331. The reversal of 503145432654321 is 123456234541305.

It is not a de Polignac number, because 503145432654321 - 2¹¹ = 503145432652273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (503145432654331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63331015 + ... + 70831548.

It is an arithmetic number, because the mean of its divisors is an integer number (42121141943184).

Almost surely, 2^{503145432654321} is an apocalyptic number.

It is an amenable number.

503145432654321 is a deficient number, since it is larger than the sum of its proper divisors (170792838436623).

503145432654321 is a wasteful number, since it uses less digits than its factorization.

503145432654321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134168300.

The product of its (nonzero) digits is 5184000, while the sum is 48.

The spelling of 503145432654321 in words is "five hundred three trillion, one hundred forty-five billion, four hundred thirty-two million, six hundred fifty-four thousand, three hundred twenty-one".