11451262591 has 4 divisors (see below), whose sum is σ = 11552601312. Its totient is φ = 11349923872.

The previous prime is 11451262583. The next prime is 11451262607. The reversal of 11451262591 is 19526215411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19526215411 = 5791 ⋅3371821.

It is a cyclic number.

It is not a de Polignac number, because 11451262591 - 2³ = 11451262583 is a prime.

It is a super-2 number, since 2×11451262591² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11451262591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11451262531) 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, 50669191 + ... + 50669416.

It is an arithmetic number, because the mean of its divisors is an integer number (2888150328).

Almost surely, 2^11451262591 is an apocalyptic number.

11451262591 is a deficient number, since it is larger than the sum of its proper divisors (101338721).

11451262591 is a wasteful number, since it uses less digits than its factorization.

11451262591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101338720.

The product of its digits is 21600, while the sum is 37.

The spelling of 11451262591 in words is "eleven billion, four hundred fifty-one million, two hundred sixty-two thousand, five hundred ninety-one".