16629461857 has 2 divisors, whose sum is σ = 16629461858. Its totient is φ = 16629461856.

The previous prime is 16629461813. The next prime is 16629461887. The reversal of 16629461857 is 75816492661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15176022481 + 1453439376 = 123191^2 + 38124^2 .

It is a cyclic number.

It is not a de Polignac number, because 16629461857 - 2¹⁹ = 16628937569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16629461798 and 16629461807.

It is not a weakly prime, because it can be changed into another prime (16629461887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8314730928 + 8314730929.

It is an arithmetic number, because the mean of its divisors is an integer number (8314730929).

Almost surely, 2^16629461857 is an apocalyptic number.

It is an amenable number.

16629461857 is a deficient number, since it is larger than the sum of its proper divisors (1).

16629461857 is an equidigital number, since it uses as much as digits as its factorization.

16629461857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 55.

The spelling of 16629461857 in words is "sixteen billion, six hundred twenty-nine million, four hundred sixty-one thousand, eight hundred fifty-seven".