1564928401 has 2 divisors, whose sum is σ = 1564928402. Its totient is φ = 1564928400.

The previous prime is 1564928399. The next prime is 1564928413. The reversal of 1564928401 is 1048294651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1251461376 + 313467025 = 35376^2 + 17705^2 .

It is an emirp because it is prime and its reverse (1048294651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1564928401 - 2¹ = 1564928399 is a prime.

Together with 1564928399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1564928501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782464200 + 782464201.

It is an arithmetic number, because the mean of its divisors is an integer number (782464201).

Almost surely, 2^1564928401 is an apocalyptic number.

It is an amenable number.

1564928401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1564928401 is an equidigital number, since it uses as much as digits as its factorization.

1564928401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 1564928401 is about 39559.1759393443. The cubic root of 1564928401 is about 1160.9980513167.

The spelling of 1564928401 in words is "one billion, five hundred sixty-four million, nine hundred twenty-eight thousand, four hundred one".