16581054473 has 2 divisors, whose sum is σ = 16581054474. Its totient is φ = 16581054472.

The previous prime is 16581054467. The next prime is 16581054527. The reversal of 16581054473 is 37445018561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15625750009 + 955304464 = 125003^2 + 30908^2 .

It is a cyclic number.

It is not a de Polignac number, because 16581054473 - 2⁶ = 16581054409 is a prime.

It is not a weakly prime, because it can be changed into another prime (16581084473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8290527236 + 8290527237.

It is an arithmetic number, because the mean of its divisors is an integer number (8290527237).

Almost surely, 2^16581054473 is an apocalyptic number.

It is an amenable number.

16581054473 is a deficient number, since it is larger than the sum of its proper divisors (1).

16581054473 is an equidigital number, since it uses as much as digits as its factorization.

16581054473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 16581054473 in words is "sixteen billion, five hundred eighty-one million, fifty-four thousand, four hundred seventy-three".