19158461461 has 2 divisors, whose sum is σ = 19158461462. Its totient is φ = 19158461460.

The previous prime is 19158461449. The next prime is 19158461473. The reversal of 19158461461 is 16416485191.

It is a balanced prime because it is at equal distance from previous prime (19158461449) and next prime (19158461473).

It can be written as a sum of positive squares in only one way, i.e., 13517550225 + 5640911236 = 116265^2 + 75106^2 .

It is an emirp because it is prime and its reverse (16416485191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19158461461 - 2¹¹ = 19158459413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19158461401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9579230730 + 9579230731.

It is an arithmetic number, because the mean of its divisors is an integer number (9579230731).

Almost surely, 2^19158461461 is an apocalyptic number.

It is an amenable number.

19158461461 is a deficient number, since it is larger than the sum of its proper divisors (1).

19158461461 is an equidigital number, since it uses as much as digits as its factorization.

19158461461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 46.

The spelling of 19158461461 in words is "nineteen billion, one hundred fifty-eight million, four hundred sixty-one thousand, four hundred sixty-one".