1894112687461 has 2 divisors, whose sum is σ = 1894112687462. Its totient is φ = 1894112687460.

The previous prime is 1894112687449. The next prime is 1894112687501. The reversal of 1894112687461 is 1647862114981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1499767622500 + 394345064961 = 1224650^2 + 627969^2 .

It is a cyclic number.

It is not a de Polignac number, because 1894112687461 - 2⁷ = 1894112687333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1894112687396 and 1894112687405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1894112687161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 947056343730 + 947056343731.

It is an arithmetic number, because the mean of its divisors is an integer number (947056343731).

Almost surely, 2^{1894112687461} is an apocalyptic number.

It is an amenable number.

1894112687461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1894112687461 is an equidigital number, since it uses as much as digits as its factorization.

1894112687461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4644864, while the sum is 58.

The spelling of 1894112687461 in words is "one trillion, eight hundred ninety-four billion, one hundred twelve million, six hundred eighty-seven thousand, four hundred sixty-one".