1634274724861 has 2 divisors, whose sum is σ = 1634274724862. Its totient is φ = 1634274724860.

The previous prime is 1634274724847. The next prime is 1634274724889. The reversal of 1634274724861 is 1684274724361.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1322341304761 + 311933420100 = 1149931^2 + 558510^2 .

It is an emirp because it is prime and its reverse (1684274724361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1634274724861 - 2¹⁵ = 1634274692093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1634274724811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 817137362430 + 817137362431.

It is an arithmetic number, because the mean of its divisors is an integer number (817137362431).

Almost surely, 2^{1634274724861} is an apocalyptic number.

It is an amenable number.

1634274724861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1634274724861 is an equidigital number, since it uses as much as digits as its factorization.

1634274724861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10838016, while the sum is 55.

The spelling of 1634274724861 in words is "one trillion, six hundred thirty-four billion, two hundred seventy-four million, seven hundred twenty-four thousand, eight hundred sixty-one".