10639346881 has 2 divisors, whose sum is σ = 10639346882. Its totient is φ = 10639346880.

The previous prime is 10639346873. The next prime is 10639346897. The reversal of 10639346881 is 18864393601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9627534400 + 1011812481 = 98120^2 + 31809^2 .

It is a cyclic number.

It is not a de Polignac number, because 10639346881 - 2³ = 10639346873 is a prime.

It is a super-2 number, since 2×10639346881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10639346801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5319673440 + 5319673441.

It is an arithmetic number, because the mean of its divisors is an integer number (5319673441).

Almost surely, 2^10639346881 is an apocalyptic number.

It is an amenable number.

10639346881 is a deficient number, since it is larger than the sum of its proper divisors (1).

10639346881 is an equidigital number, since it uses as much as digits as its factorization.

10639346881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 10639346881 in words is "ten billion, six hundred thirty-nine million, three hundred forty-six thousand, eight hundred eighty-one".