501001005501 has 12 divisors (see below), whose sum is σ = 723692249280. Its totient is φ = 333989533320.

The previous prime is 501001005413. The next prime is 501001005503. The reversal of 501001005501 is 105500100105.

501001005501 is a `hidden beast` number, since 5 + 0 + 10 + 0 + 100 + 550 + 1 = 666.

It is not a de Polignac number, because 501001005501 - 2⁹ = 501001004989 is a prime.

It is a super-2 number, since 2×501001005501² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501001005503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 638421 + ... + 1187258.

It is an arithmetic number, because the mean of its divisors is an integer number (60307687440).

Almost surely, 2^501001005501 is an apocalyptic number.

It is an amenable number.

501001005501 is a deficient number, since it is larger than the sum of its proper divisors (222691243779).

501001005501 is a wasteful number, since it uses less digits than its factorization.

501001005501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856176 (or 1856173 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 18.

Adding to 501001005501 its reverse (105500100105), we get a palindrome (606501105606).

The spelling of 501001005501 in words is "five hundred one billion, one million, five thousand, five hundred one".