11581000007 has 4 divisors (see below), whose sum is σ = 11581713480. Its totient is φ = 11580286536.

The previous prime is 11581000003. The next prime is 11581000031. The reversal of 11581000007 is 70000018511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70000018511 = 83 ⋅843373717.

It is a cyclic number.

It is not a de Polignac number, because 11581000007 - 2² = 11581000003 is a prime.

It is a super-2 number, since 2×11581000007² (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 (11581000003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331808 + ... + 365045.

It is an arithmetic number, because the mean of its divisors is an integer number (2895428370).

Almost surely, 2^11581000007 is an apocalyptic number.

11581000007 is a deficient number, since it is larger than the sum of its proper divisors (713473).

11581000007 is an equidigital number, since it uses as much as digits as its factorization.

11581000007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713472.

The product of its (nonzero) digits is 280, while the sum is 23.

Adding to 11581000007 its reverse (70000018511), we get a palindrome (81581018518).

The spelling of 11581000007 in words is "eleven billion, five hundred eighty-one million, seven", and thus it is an aban number.