11526000781 has 4 divisors (see below), whose sum is σ = 11602332064. Its totient is φ = 11449669500.

The previous prime is 11526000767. The next prime is 11526000797. The reversal of 11526000781 is 18700062511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18700062511 = 13 ⋅1438466347.

It is a cyclic number.

It is not a de Polignac number, because 11526000781 - 2¹¹ = 11525998733 is a prime.

It is a super-2 number, since 2×11526000781² (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 (11526000701) 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, 38165415 + ... + 38165716.

It is an arithmetic number, because the mean of its divisors is an integer number (2900583016).

Almost surely, 2^11526000781 is an apocalyptic number.

11526000781 is the 48013-rd centered decagonal number.

It is an amenable number.

11526000781 is a deficient number, since it is larger than the sum of its proper divisors (76331283).

11526000781 is an equidigital number, since it uses as much as digits as its factorization.

11526000781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76331282.

The product of its (nonzero) digits is 3360, while the sum is 31.

The spelling of 11526000781 in words is "eleven billion, five hundred twenty-six million, seven hundred eighty-one", and thus it is an aban number.