16780051 has 2 divisors, whose sum is σ = 16780052. Its totient is φ = 16780050.

The previous prime is 16780031. The next prime is 16780073. The reversal of 16780051 is 15008761.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16780051 - 2²³ = 8391443 is a prime.

It is a super-2 number, since 2×16780051² = 563140223125202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16780031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8390025 + 8390026.

It is an arithmetic number, because the mean of its divisors is an integer number (8390026).

Almost surely, 2^16780051 is an apocalyptic number.

16780051 is a deficient number, since it is larger than the sum of its proper divisors (1).

16780051 is an equidigital number, since it uses as much as digits as its factorization.

16780051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 16780051 is about 4096.3460547175. The cubic root of 16780051 is about 256.0144187435.

The spelling of 16780051 in words is "sixteen million, seven hundred eighty thousand, fifty-one".