1564689401393 has 2 divisors, whose sum is σ = 1564689401394. Its totient is φ = 1564689401392.

The previous prime is 1564689401321. The next prime is 1564689401413. The reversal of 1564689401393 is 3931049864651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1491664067569 + 73025333824 = 1221337^2 + 270232^2 .

It is a cyclic number.

It is not a de Polignac number, because 1564689401393 - 2¹⁶ = 1564689335857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1564689451393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782344700696 + 782344700697.

It is an arithmetic number, because the mean of its divisors is an integer number (782344700697).

Almost surely, 2^{1564689401393} is an apocalyptic number.

It is an amenable number.

1564689401393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1564689401393 is an equidigital number, since it uses as much as digits as its factorization.

1564689401393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16796160, while the sum is 59.

The spelling of 1564689401393 in words is "one trillion, five hundred sixty-four billion, six hundred eighty-nine million, four hundred one thousand, three hundred ninety-three".