16776777137 has 2 divisors, whose sum is σ = 16776777138. Its totient is φ = 16776777136.

The previous prime is 16776777053. The next prime is 16776777161. The reversal of 16776777137 is 73177767761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11011564096 + 5765213041 = 104936^2 + 75929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16776777137 is a prime.

It is a super-2 number, since 2×16776777137² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16776177137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8388388568 + 8388388569.

It is an arithmetic number, because the mean of its divisors is an integer number (8388388569).

Almost surely, 2^16776777137 is an apocalyptic number.

It is an amenable number.

16776777137 is a deficient number, since it is larger than the sum of its proper divisors (1).

16776777137 is an equidigital number, since it uses as much as digits as its factorization.

16776777137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12706092, while the sum is 59.

The spelling of 16776777137 in words is "sixteen billion, seven hundred seventy-six million, seven hundred seventy-seven thousand, one hundred thirty-seven".