10786487981 has 8 divisors (see below), whose sum is σ = 11422544184. Its totient is φ = 10150604800.

The previous prime is 10786487941. The next prime is 10786488001. The reversal of 10786487981 is 18978468701.

It can be written as a sum of positive squares in 4 ways, for example, as 6601562500 + 4184925481 = 81250^2 + 64691^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10786487981 - 2⁶ = 10786487917 is a prime.

It is a super-2 number, since 2×10786487981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10786487981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10786487941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98381 + ... + 176781.

It is an arithmetic number, because the mean of its divisors is an integer number (1427818023).

Almost surely, 2^10786487981 is an apocalyptic number.

It is an amenable number.

10786487981 is a deficient number, since it is larger than the sum of its proper divisors (636056203).

10786487981 is an equidigital number, since it uses as much as digits as its factorization.

10786487981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86511.

The product of its (nonzero) digits is 5419008, while the sum is 59.

The spelling of 10786487981 in words is "ten billion, seven hundred eighty-six million, four hundred eighty-seven thousand, nine hundred eighty-one".