16845113977 has 2 divisors, whose sum is σ = 16845113978. Its totient is φ = 16845113976.

The previous prime is 16845113941. The next prime is 16845113983. The reversal of 16845113977 is 77931154861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16709181696 + 135932281 = 129264^2 + 11659^2 .

It is a cyclic number.

It is not a de Polignac number, because 16845113977 - 2²³ = 16836725369 is a prime.

It is not a weakly prime, because it can be changed into another prime (16845113177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8422556988 + 8422556989.

It is an arithmetic number, because the mean of its divisors is an integer number (8422556989).

Almost surely, 2^16845113977 is an apocalyptic number.

It is an amenable number.

16845113977 is a deficient number, since it is larger than the sum of its proper divisors (1).

16845113977 is an equidigital number, since it uses as much as digits as its factorization.

16845113977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 52.

The spelling of 16845113977 in words is "sixteen billion, eight hundred forty-five million, one hundred thirteen thousand, nine hundred seventy-seven".