505550005501 has 4 divisors (see below), whose sum is σ = 505557844992. Its totient is φ = 505542166012.

The previous prime is 505550005481. The next prime is 505550005537. The reversal of 505550005501 is 105500055505.

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 not a de Polignac number, because 505550005501 - 2⁵ = 505550005469 is a prime.

It is a super-2 number, since 2×505550005501² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505550005001) 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, 3822205 + ... + 3952258.

It is an arithmetic number, because the mean of its divisors is an integer number (126389461248).

Almost surely, 2^505550005501 is an apocalyptic number.

It is an amenable number.

505550005501 is a deficient number, since it is larger than the sum of its proper divisors (7839491).

505550005501 is an equidigital number, since it uses as much as digits as its factorization.

505550005501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7839490.

The product of its (nonzero) digits is 15625, while the sum is 31.

The spelling of 505550005501 in words is "five hundred five billion, five hundred fifty million, five thousand, five hundred one".