145640563 has 2 divisors, whose sum is σ = 145640564. Its totient is φ = 145640562.

The previous prime is 145640543. The next prime is 145640591. The reversal of 145640563 is 365046541.

145640563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (365046541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145640563 - 2⁹ = 145640051 is a prime.

It is a super-2 number, since 2×145640563² = 42422347181913938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145640543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72820281 + 72820282.

It is an arithmetic number, because the mean of its divisors is an integer number (72820282).

Almost surely, 2^145640563 is an apocalyptic number.

145640563 is a deficient number, since it is larger than the sum of its proper divisors (1).

145640563 is an equidigital number, since it uses as much as digits as its factorization.

145640563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 145640563 is about 12068.1631990954. The cubic root of 145640563 is about 526.1312724449.

It can be divided in two parts, 145 and 640563, that multiplied together give a triangular number (92881635 = T₁₃₆₂₉).

The spelling of 145640563 in words is "one hundred forty-five million, six hundred forty thousand, five hundred sixty-three".