16856373461 has 2 divisors, whose sum is σ = 16856373462. Its totient is φ = 16856373460.

The previous prime is 16856373437. The next prime is 16856373503. The reversal of 16856373461 is 16437365861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16846482436 + 9891025 = 129794^2 + 3145^2 .

It is a cyclic number.

It is not a de Polignac number, because 16856373461 - 2⁶ = 16856373397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16856373361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8428186730 + 8428186731.

It is an arithmetic number, because the mean of its divisors is an integer number (8428186731).

Almost surely, 2^16856373461 is an apocalyptic number.

It is an amenable number.

16856373461 is a deficient number, since it is larger than the sum of its proper divisors (1).

16856373461 is an equidigital number, since it uses as much as digits as its factorization.

16856373461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 50.

The spelling of 16856373461 in words is "sixteen billion, eight hundred fifty-six million, three hundred seventy-three thousand, four hundred sixty-one".