10865503949 has 2 divisors, whose sum is σ = 10865503950. Its totient is φ = 10865503948.

The previous prime is 10865503919. The next prime is 10865503963. The reversal of 10865503949 is 94930556801.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10851388900 + 14115049 = 104170^2 + 3757^2 .

It is a cyclic number.

It is not a de Polignac number, because 10865503949 - 2³² = 6570536653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10865503897 and 10865503906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10865503919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5432751974 + 5432751975.

It is an arithmetic number, because the mean of its divisors is an integer number (5432751975).

Almost surely, 2^10865503949 is an apocalyptic number.

It is an amenable number.

10865503949 is a deficient number, since it is larger than the sum of its proper divisors (1).

10865503949 is an equidigital number, since it uses as much as digits as its factorization.

10865503949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 10865503949 in words is "ten billion, eight hundred sixty-five million, five hundred three thousand, nine hundred forty-nine".