10005005551 has 4 divisors (see below), whose sum is σ = 10056845152. Its totient is φ = 9953165952.

The previous prime is 10005005537. The next prime is 10005005557. The reversal of 10005005551 is 15550050001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10005005551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10005005557) 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, 25919511 + ... + 25919896.

It is an arithmetic number, because the mean of its divisors is an integer number (2514211288).

Almost surely, 2^10005005551 is an apocalyptic number.

10005005551 is a deficient number, since it is larger than the sum of its proper divisors (51839601).

10005005551 is an equidigital number, since it uses as much as digits as its factorization.

10005005551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51839600.

The product of its (nonzero) digits is 625, while the sum is 22.

Adding to 10005005551 its reverse (15550050001), we get a palindrome (25555055552).

The spelling of 10005005551 in words is "ten billion, five million, five thousand, five hundred fifty-one".