19105725641461 has 2 divisors, whose sum is σ = 19105725641462. Its totient is φ = 19105725641460.

The previous prime is 19105725641393. The next prime is 19105725641473. The reversal of 19105725641461 is 16414652750191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14950549160836 + 4155176480625 = 3866594^2 + 2038425^2 .

It is a cyclic number.

It is not a de Polignac number, because 19105725641461 - 2²⁷ = 19105591423733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19105725641399 and 19105725641408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19105729641461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9552862820730 + 9552862820731.

It is an arithmetic number, because the mean of its divisors is an integer number (9552862820731).

Almost surely, 2^{19105725641461} is an apocalyptic number.

It is an amenable number.

19105725641461 is a deficient number, since it is larger than the sum of its proper divisors (1).

19105725641461 is an equidigital number, since it uses as much as digits as its factorization.

19105725641461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 52.

The spelling of 19105725641461 in words is "nineteen trillion, one hundred five billion, seven hundred twenty-five million, six hundred forty-one thousand, four hundred sixty-one".