501161005051 has 4 divisors (see below), whose sum is σ = 572755434352. Its totient is φ = 429566575752.

The previous prime is 501161005039. The next prime is 501161005097. The reversal of 501161005051 is 150500161105.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 501161005051 - 2²⁵ = 501127450619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501161005021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35797214640 + ... + 35797214653.

It is an arithmetic number, because the mean of its divisors is an integer number (143188858588).

Almost surely, 2^501161005051 is an apocalyptic number.

501161005051 is a deficient number, since it is larger than the sum of its proper divisors (71594429301).

501161005051 is an equidigital number, since it uses as much as digits as its factorization.

501161005051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71594429300.

The product of its (nonzero) digits is 750, while the sum is 25.

Adding to 501161005051 its reverse (150500161105), we get a palindrome (651661166156).

The spelling of 501161005051 in words is "five hundred one billion, one hundred sixty-one million, five thousand, fifty-one".