501166530789001 has 27 divisors (see below), whose sum is σ = 640808996108967. Its totient is φ = 390518031435840.

The previous prime is 501166530788993. The next prime is 501166530789047. The reversal of 501166530789001 is 100987035661105.

The square root of 501166530789001 is 22386749.

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

It can be written as a sum of positive squares in only one way, i.e., 38693935998025 + 462472594790976 = 6220445^2 + 21505176^2 .

It is not a de Polignac number, because 501166530789001 - 2³ = 501166530788993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 501166530789001.

It is not an unprimeable number, because it can be changed into a prime (501166530789901) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1723634305 + ... + 1723925041.

Almost surely, 2^{501166530789001} is an apocalyptic number.

501166530789001 is the 22386749-th square number.

501166530789001 is the 11193375-th centered octagonal number.

It is an amenable number.

501166530789001 is a deficient number, since it is larger than the sum of its proper divisors (139642465319966).

501166530789001 is an frugal number, since it uses more digits than its factorization.

501166530789001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581510 (or 290755 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 52.

The spelling of 501166530789001 in words is "five hundred one trillion, one hundred sixty-six billion, five hundred thirty million, seven hundred eighty-nine thousand, one".