10501961861 has 2 divisors, whose sum is σ = 10501961862. Its totient is φ = 10501961860.

The previous prime is 10501961839. The next prime is 10501961923. The reversal of 10501961861 is 16816910501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10484531236 + 17430625 = 102394^2 + 4175^2 .

It is a cyclic number.

It is not a de Polignac number, because 10501961861 - 2¹⁰ = 10501960837 is a prime.

It is a super-2 number, since 2×10501961861² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10501961801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250980930 + 5250980931.

It is an arithmetic number, because the mean of its divisors is an integer number (5250980931).

Almost surely, 2^10501961861 is an apocalyptic number.

It is an amenable number.

10501961861 is a deficient number, since it is larger than the sum of its proper divisors (1).

10501961861 is an equidigital number, since it uses as much as digits as its factorization.

10501961861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 38.

The spelling of 10501961861 in words is "ten billion, five hundred one million, nine hundred sixty-one thousand, eight hundred sixty-one".