501095510161 has 9 divisors (see below), whose sum is σ = 508106262321. Its totient is φ = 494180220672.

The previous prime is 501095510137. The next prime is 501095510173. The reversal of 501095510161 is 161015590105.

The square root of 501095510161 is 707881.

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

It can be written as a sum of positive squares in 4 ways, for example, as 61049020561 + 440046489600 = 247081^2 + 663360^2 .

It is not a de Polignac number, because 501095510161 - 2¹³ = 501095501969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501095510191) 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, 51670465 + ... + 51680161.

It is an arithmetic number, because the mean of its divisors is an integer number (56456251369).

Almost surely, 2^501095510161 is an apocalyptic number.

501095510161 is the 707881-st square number.

501095510161 is the 353941-st centered octagonal number.

It is an amenable number.

501095510161 is a deficient number, since it is larger than the sum of its proper divisors (7010752160).

501095510161 is an frugal number, since it uses more digits than its factorization.

501095510161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19540 (or 9770 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 34.

The spelling of 501095510161 in words is "five hundred one billion, ninety-five million, five hundred ten thousand, one hundred sixty-one".