19145864067101 has 2 divisors, whose sum is σ = 19145864067102. Its totient is φ = 19145864067100.

The previous prime is 19145864067073. The next prime is 19145864067107. The reversal of 19145864067101 is 10176046854191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18284817405625 + 861046661476 = 4276075^2 + 927926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19145864067101 is a prime.

It is a super-2 number, since 2×19145864067101² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19145864067107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9572932033550 + 9572932033551.

It is an arithmetic number, because the mean of its divisors is an integer number (9572932033551).

Almost surely, 2^{19145864067101} is an apocalyptic number.

It is an amenable number.

19145864067101 is a deficient number, since it is larger than the sum of its proper divisors (1).

19145864067101 is an equidigital number, since it uses as much as digits as its factorization.

19145864067101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 19145864067101 in words is "nineteen trillion, one hundred forty-five billion, eight hundred sixty-four million, sixty-seven thousand, one hundred one".