501161601 has 8 divisors (see below), whose sum is σ = 672641344. Its totient is φ = 331894800.

The previous prime is 501161599. The next prime is 501161663. The reversal of 501161601 is 106161105.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 501161601 - 2¹ = 501161599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501161501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552706 + ... + 553611.

It is an arithmetic number, because the mean of its divisors is an integer number (84080168).

Almost surely, 2^501161601 is an apocalyptic number.

It is an amenable number.

501161601 is a deficient number, since it is larger than the sum of its proper divisors (171479743).

501161601 is a wasteful number, since it uses less digits than its factorization.

501161601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106471.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 501161601 is about 22386.6388946621. The cubic root of 501161601 is about 794.3146928346.

The spelling of 501161601 in words is "five hundred one million, one hundred sixty-one thousand, six hundred one".