501105551109 has 4 divisors (see below), whose sum is σ = 668140734816. Its totient is φ = 334070367404.

The previous prime is 501105551071. The next prime is 501105551119. The reversal of 501105551109 is 901155501105.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-501105551109 is a prime.

It is a super-2 number, since 2×501105551109² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 501105551109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501105551119) 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, 83517591849 + ... + 83517591854.

It is an arithmetic number, because the mean of its divisors is an integer number (167035183704).

Almost surely, 2^501105551109 is an apocalyptic number.

It is an amenable number.

501105551109 is a deficient number, since it is larger than the sum of its proper divisors (167035183707).

501105551109 is a wasteful number, since it uses less digits than its factorization.

501105551109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167035183706.

The product of its (nonzero) digits is 5625, while the sum is 33.

The spelling of 501105551109 in words is "five hundred one billion, one hundred five million, five hundred fifty-one thousand, one hundred nine".