16583580397 has 2 divisors, whose sum is σ = 16583580398. Its totient is φ = 16583580396.

The previous prime is 16583580389. The next prime is 16583580401. The reversal of 16583580397 is 79308538561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16344599716 + 238980681 = 127846^2 + 15459^2 .

It is a cyclic number.

It is not a de Polignac number, because 16583580397 - 2³ = 16583580389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16583580997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8291790198 + 8291790199.

It is an arithmetic number, because the mean of its divisors is an integer number (8291790199).

Almost surely, 2^16583580397 is an apocalyptic number.

It is an amenable number.

16583580397 is a deficient number, since it is larger than the sum of its proper divisors (1).

16583580397 is an equidigital number, since it uses as much as digits as its factorization.

16583580397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 16583580397 in words is "sixteen billion, five hundred eighty-three million, five hundred eighty thousand, three hundred ninety-seven".