500251400161 has 8 divisors (see below), whose sum is σ = 506526699240. Its totient is φ = 493990645632.

The previous prime is 500251400111. The next prime is 500251400177. The reversal of 500251400161 is 161004152005.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9298937761 + 490952462400 = 96431^2 + 700680^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 500251400161 - 2¹⁵ = 500251367393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (500251400111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3566910 + ... + 3704503.

It is an arithmetic number, because the mean of its divisors is an integer number (63315837405).

Almost surely, 2^500251400161 is an apocalyptic number.

It is an amenable number.

500251400161 is a deficient number, since it is larger than the sum of its proper divisors (6275299079).

500251400161 is an equidigital number, since it uses as much as digits as its factorization.

500251400161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7272275.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 500251400161 its reverse (161004152005), we get a palindrome (661255552166).

The spelling of 500251400161 in words is "five hundred billion, two hundred fifty-one million, four hundred thousand, one hundred sixty-one".