19461504569161 has 2 divisors, whose sum is σ = 19461504569162. Its totient is φ = 19461504569160.

The previous prime is 19461504569113. The next prime is 19461504569189. The reversal of 19461504569161 is 16196540516491.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13962216926025 + 5499287643136 = 3736605^2 + 2345056^2 .

It is a cyclic number.

It is not a de Polignac number, because 19461504569161 - 2²⁷ = 19461370351433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19461504569096 and 19461504569105.

It is not a weakly prime, because it can be changed into another prime (19461504569261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9730752284580 + 9730752284581.

It is an arithmetic number, because the mean of its divisors is an integer number (9730752284581).

Almost surely, 2^{19461504569161} is an apocalyptic number.

It is an amenable number.

19461504569161 is a deficient number, since it is larger than the sum of its proper divisors (1).

19461504569161 is an equidigital number, since it uses as much as digits as its factorization.

19461504569161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6998400, while the sum is 58.

The spelling of 19461504569161 in words is "nineteen trillion, four hundred sixty-one billion, five hundred four million, five hundred sixty-nine thousand, one hundred sixty-one".