16977625856969 has 2 divisors, whose sum is σ = 16977625856970. Its totient is φ = 16977625856968.

The previous prime is 16977625856809. The next prime is 16977625856981. The reversal of 16977625856969 is 96965852677961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15330458960569 + 1647166896400 = 3915413^2 + 1283420^2 .

It is a cyclic number.

It is not a de Polignac number, because 16977625856969 - 2⁸ = 16977625856713 is a prime.

It is a super-2 number, since 2×16977625856969² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16977625856069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8488812928484 + 8488812928485.

It is an arithmetic number, because the mean of its divisors is an integer number (8488812928485).

Almost surely, 2^{16977625856969} is an apocalyptic number.

It is an amenable number.

16977625856969 is a deficient number, since it is larger than the sum of its proper divisors (1).

16977625856969 is an equidigital number, since it uses as much as digits as its factorization.

16977625856969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18517766400, while the sum is 86.

The spelling of 16977625856969 in words is "sixteen trillion, nine hundred seventy-seven billion, six hundred twenty-five million, eight hundred fifty-six thousand, nine hundred sixty-nine".