10011005551 has 4 divisors (see below), whose sum is σ = 10537900600. Its totient is φ = 9484110504.

The previous prime is 10011005549. The next prime is 10011005573. The reversal of 10011005551 is 15550011001.

It is a happy number.

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 10011005551 - 2¹ = 10011005549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 526895029 = 10011005551 / (1 + 0 + 0 + 1 + 1 + 0 + 0 + 5 + 5 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011005591) 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, 263447496 + ... + 263447533.

It is an arithmetic number, because the mean of its divisors is an integer number (2634475150).

Almost surely, 2^10011005551 is an apocalyptic number.

10011005551 is a deficient number, since it is larger than the sum of its proper divisors (526895049).

10011005551 is an equidigital number, since it uses as much as digits as its factorization.

10011005551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526895048.

The product of its (nonzero) digits is 125, while the sum is 19.

Adding to 10011005551 its reverse (15550011001), we get a palindrome (25561016552).

The spelling of 10011005551 in words is "ten billion, eleven million, five thousand, five hundred fifty-one".