503156260135661 has 16 divisors (see below), whose sum is σ = 551430245223360. Its totient is φ = 455307839224320.

The previous prime is 503156260135597. The next prime is 503156260135691. The reversal of 503156260135661 is 166531062651305.

It is a cyclic number.

It is not a de Polignac number, because 503156260135661 - 2⁶ = 503156260135597 is a prime.

It is a super-2 number, since 2×503156260135661² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503156260135691) 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, 84099770 + ... + 89883723.

It is an arithmetic number, because the mean of its divisors is an integer number (34464390326460).

Almost surely, 2^{503156260135661} is an apocalyptic number.

It is an amenable number.

503156260135661 is a deficient number, since it is larger than the sum of its proper divisors (48273985087699).

503156260135661 is a wasteful number, since it uses less digits than its factorization.

503156260135661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173984716.

The product of its (nonzero) digits is 2916000, while the sum is 50.

The spelling of 503156260135661 in words is "five hundred three trillion, one hundred fifty-six billion, two hundred sixty million, one hundred thirty-five thousand, six hundred sixty-one".