16380557 has 2 divisors, whose sum is σ = 16380558. Its totient is φ = 16380556.

The previous prime is 16380541. The next prime is 16380569. The reversal of 16380557 is 75508361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12823561 + 3556996 = 3581^2 + 1886^2 .

It is a cyclic number.

It is not a de Polignac number, because 16380557 - 2⁴ = 16380541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16380517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8190278 + 8190279.

It is an arithmetic number, because the mean of its divisors is an integer number (8190279).

Almost surely, 2^16380557 is an apocalyptic number.

It is an amenable number.

16380557 is a deficient number, since it is larger than the sum of its proper divisors (1).

16380557 is an equidigital number, since it uses as much as digits as its factorization.

16380557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 16380557 is about 4047.2900810295. The cubic root of 16380557 is about 253.9663759819.

The spelling of 16380557 in words is "sixteen million, three hundred eighty thousand, five hundred fifty-seven".