861362631149 has 2 divisors, whose sum is σ = 861362631150. Its totient is φ = 861362631148.

The previous prime is 861362631067. The next prime is 861362631169. The reversal of 861362631149 is 941136263168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 639851208649 + 221511422500 = 799907^2 + 470650^2 .

It is a cyclic number.

It is not a de Polignac number, because 861362631149 - 2²⁴ = 861345853933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 861362631097 and 861362631106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861362631169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430681315574 + 430681315575.

It is an arithmetic number, because the mean of its divisors is an integer number (430681315575).

Almost surely, 2^861362631149 is an apocalyptic number.

It is an amenable number.

861362631149 is a deficient number, since it is larger than the sum of its proper divisors (1).

861362631149 is an equidigital number, since it uses as much as digits as its factorization.

861362631149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 50.

The spelling of 861362631149 in words is "eight hundred sixty-one billion, three hundred sixty-two million, six hundred thirty-one thousand, one hundred forty-nine".