16557286073 has 2 divisors, whose sum is σ = 16557286074. Its totient is φ = 16557286072.

The previous prime is 16557286003. The next prime is 16557286117. The reversal of 16557286073 is 37068275561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15333125929 + 1224160144 = 123827^2 + 34988^2 .

It is a cyclic number.

It is not a de Polignac number, because 16557286073 - 2¹² = 16557281977 is a prime.

It is a super-2 number, since 2×16557286073² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16557286003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8278643036 + 8278643037.

It is an arithmetic number, because the mean of its divisors is an integer number (8278643037).

Almost surely, 2^16557286073 is an apocalyptic number.

It is an amenable number.

16557286073 is a deficient number, since it is larger than the sum of its proper divisors (1).

16557286073 is an equidigital number, since it uses as much as digits as its factorization.

16557286073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The spelling of 16557286073 in words is "sixteen billion, five hundred fifty-seven million, two hundred eighty-six thousand, seventy-three".