861362631401 has 2 divisors, whose sum is σ = 861362631402. Its totient is φ = 861362631400.

The previous prime is 861362631397. The next prime is 861362631419. The reversal of 861362631401 is 104136263168.

861362631401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 851146475776 + 10216155625 = 922576^2 + 101075^2 .

It is a cyclic number.

It is not a de Polignac number, because 861362631401 - 2² = 861362631397 is a prime.

It is not a weakly prime, because it can be changed into another prime (861302631401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430681315700 + 430681315701.

It is an arithmetic number, because the mean of its divisors is an integer number (430681315701).

Almost surely, 2^861362631401 is an apocalyptic number.

It is an amenable number.

861362631401 is a deficient number, since it is larger than the sum of its proper divisors (1).

861362631401 is an equidigital number, since it uses as much as digits as its factorization.

861362631401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 41.

Adding to 861362631401 its reverse (104136263168), we get a palindrome (965498894569).

The spelling of 861362631401 in words is "eight hundred sixty-one billion, three hundred sixty-two million, six hundred thirty-one thousand, four hundred one".