19158890481 has 6 divisors (see below), whose sum is σ = 27673952930. Its totient is φ = 12772593648.

The previous prime is 19158890473. The next prime is 19158890549. The reversal of 19158890481 is 18409885191.

19158890481 is a `hidden beast` number, since 1 + 9 + 158 + 8 + 9 + 0 + 481 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16298352225 + 2860538256 = 127665^2 + 53484^2 .

It is not a de Polignac number, because 19158890481 - 2³ = 19158890473 is a prime.

It is a super-2 number, since 2×19158890481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19158890411) 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, 1064382796 + ... + 1064382813.

Almost surely, 2^19158890481 is an apocalyptic number.

It is an amenable number.

19158890481 is a deficient number, since it is larger than the sum of its proper divisors (8515062449).

19158890481 is a wasteful number, since it uses less digits than its factorization.

19158890481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128765615 (or 2128765612 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 54.

The spelling of 19158890481 in words is "nineteen billion, one hundred fifty-eight million, eight hundred ninety thousand, four hundred eighty-one".