11421772532551 has 4 divisors (see below), whose sum is σ = 12093641505072. Its totient is φ = 10749903560032.

The previous prime is 11421772532539. The next prime is 11421772532557. The reversal of 11421772532551 is 15523527712411.

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 11421772532551 - 2¹¹ = 11421772530503 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 (11421772532557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335934486235 + ... + 335934486268.

It is an arithmetic number, because the mean of its divisors is an integer number (3023410376268).

Almost surely, 2^{11421772532551} is an apocalyptic number.

11421772532551 is a deficient number, since it is larger than the sum of its proper divisors (671868972521).

11421772532551 is an equidigital number, since it uses as much as digits as its factorization.

11421772532551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671868972520.

The product of its digits is 588000, while the sum is 46.

The spelling of 11421772532551 in words is "eleven trillion, four hundred twenty-one billion, seven hundred seventy-two million, five hundred thirty-two thousand, five hundred fifty-one".