506005500551 has 4 divisors (see below), whose sum is σ = 511015456104. Its totient is φ = 500995545000.

The previous prime is 506005500547. The next prime is 506005500587. The reversal of 506005500551 is 155005500605.

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 506005500551 - 2² = 506005500547 is a prime.

It is a super-2 number, since 2×506005500551² (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 (506005500751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2504977625 + ... + 2504977826.

It is an arithmetic number, because the mean of its divisors is an integer number (127753864026).

Almost surely, 2^506005500551 is an apocalyptic number.

506005500551 is a deficient number, since it is larger than the sum of its proper divisors (5009955553).

506005500551 is a wasteful number, since it uses less digits than its factorization.

506005500551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5009955552.

The product of its (nonzero) digits is 18750, while the sum is 32.

The spelling of 506005500551 in words is "five hundred six billion, five million, five hundred thousand, five hundred fifty-one".