11458880581 has 4 divisors (see below), whose sum is σ = 11492883532. Its totient is φ = 11424877632.

The previous prime is 11458880567. The next prime is 11458880597. The reversal of 11458880581 is 18508885411.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8137663681 + 3321216900 = 90209^2 + 57630^2 .

It is a cyclic number.

It is not a de Polignac number, because 11458880581 - 2⁷ = 11458880453 is a prime.

It is a super-2 number, since 2×11458880581² (a number of 21 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 (11458880551) 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, 17000970 + ... + 17001643.

It is an arithmetic number, because the mean of its divisors is an integer number (2873220883).

Almost surely, 2^11458880581 is an apocalyptic number.

It is an amenable number.

11458880581 is a deficient number, since it is larger than the sum of its proper divisors (34002951).

11458880581 is an equidigital number, since it uses as much as digits as its factorization.

11458880581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34002950.

The product of its (nonzero) digits is 409600, while the sum is 49.

The spelling of 11458880581 in words is "eleven billion, four hundred fifty-eight million, eight hundred eighty thousand, five hundred eighty-one".