10671978581 has 4 divisors (see below), whose sum is σ = 11642158464. Its totient is φ = 9701798700.

The previous prime is 10671978557. The next prime is 10671978589. The reversal of 10671978581 is 18587917601.

10671978581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 18587917601 = 11 ⋅1689810691.

It is not a de Polignac number, because 10671978581 - 2⁶ = 10671978517 is a prime.

It is a super-2 number, since 2×10671978581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10671978589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485089925 + ... + 485089946.

It is an arithmetic number, because the mean of its divisors is an integer number (2910539616).

Almost surely, 2^10671978581 is an apocalyptic number.

10671978581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10671978581 is a deficient number, since it is larger than the sum of its proper divisors (970179883).

10671978581 is an equidigital number, since it uses as much as digits as its factorization.

10671978581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970179882.

The product of its (nonzero) digits is 846720, while the sum is 53.

The spelling of 10671978581 in words is "ten billion, six hundred seventy-one million, nine hundred seventy-eight thousand, five hundred eighty-one".