72144563 has 2 divisors, whose sum is σ = 72144564. Its totient is φ = 72144562.

The previous prime is 72144529. The next prime is 72144571. The reversal of 72144563 is 36544127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72144563 - 2²⁰ = 71095987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72144263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36072281 + 36072282.

It is an arithmetic number, because the mean of its divisors is an integer number (36072282).

Almost surely, 2^72144563 is an apocalyptic number.

72144563 is a deficient number, since it is larger than the sum of its proper divisors (1).

72144563 is an equidigital number, since it uses as much as digits as its factorization.

72144563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 32.

The square root of 72144563 is about 8493.7955591125. The cubic root of 72144563 is about 416.2950073227.

The spelling of 72144563 in words is "seventy-two million, one hundred forty-four thousand, five hundred sixty-three".