1564452140623 has 2 divisors, whose sum is σ = 1564452140624. Its totient is φ = 1564452140622.

The previous prime is 1564452140597. The next prime is 1564452140633. The reversal of 1564452140623 is 3260412544651.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1564452140623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1564452140623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1564452140633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782226070311 + 782226070312.

It is an arithmetic number, because the mean of its divisors is an integer number (782226070312).

Almost surely, 2^{1564452140623} is an apocalyptic number.

1564452140623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1564452140623 is an equidigital number, since it uses as much as digits as its factorization.

1564452140623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 1564452140623 in words is "one trillion, five hundred sixty-four billion, four hundred fifty-two million, one hundred forty thousand, six hundred twenty-three".