19390632425649 has 6 divisors (see below), whose sum is σ = 28008691281506. Its totient is φ = 12927088283760.

The previous prime is 19390632425597. The next prime is 19390632425699. The reversal of 19390632425649 is 94652423609391.

19390632425649 is a `hidden beast` number, since 1 + 9 + 3 + 9 + 0 + 63 + 2 + 4 + 2 + 564 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19174808999025 + 215823426624 = 4378905^2 + 464568^2 .

It is not a de Polignac number, because 19390632425649 - 2³⁵ = 19356272687281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19390632425699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1077257356972 + ... + 1077257356989.

Almost surely, 2^{19390632425649} is an apocalyptic number.

It is an amenable number.

19390632425649 is a deficient number, since it is larger than the sum of its proper divisors (8618058855857).

19390632425649 is a wasteful number, since it uses less digits than its factorization.

19390632425649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2154514713967 (or 2154514713964 counting only the distinct ones).

The product of its (nonzero) digits is 75582720, while the sum is 63.

The spelling of 19390632425649 in words is "nineteen trillion, three hundred ninety billion, six hundred thirty-two million, four hundred twenty-five thousand, six hundred forty-nine".