10671581813 has 4 divisors (see below), whose sum is σ = 10693495200. Its totient is φ = 10649668428.

The previous prime is 10671581807. The next prime is 10671581827. The reversal of 10671581813 is 31818517601.

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: 31818517601 = 13 ⋅2447578277.

It is a cyclic number.

It is not a de Polignac number, because 10671581813 - 2⁴ = 10671581797 is a prime.

It is a super-2 number, since 2×10671581813² (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 (10671580813) 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, 10955963 + ... + 10956936.

It is an arithmetic number, because the mean of its divisors is an integer number (2673373800).

Almost surely, 2^10671581813 is an apocalyptic number.

It is an amenable number.

10671581813 is a deficient number, since it is larger than the sum of its proper divisors (21913387).

10671581813 is an equidigital number, since it uses as much as digits as its factorization.

10671581813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21913386.

The product of its (nonzero) digits is 40320, while the sum is 41.

The spelling of 10671581813 in words is "ten billion, six hundred seventy-one million, five hundred eighty-one thousand, eight hundred thirteen".