78529563 has 12 divisors (see below), whose sum is σ = 129636208. Its totient is φ = 44874000.

The previous prime is 78529553. The next prime is 78529589. The reversal of 78529563 is 36592587.

It is a happy number.

78529563 is a `hidden beast` number, since 7 + 85 + 2 + 9 + 563 = 666.

It is not a de Polignac number, because 78529563 - 2²⁰ = 77480987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78529523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 623188 + ... + 623313.

Almost surely, 2^78529563 is an apocalyptic number.

78529563 is a deficient number, since it is larger than the sum of its proper divisors (51106645).

78529563 is a wasteful number, since it uses less digits than its factorization.

78529563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246514 (or 1246511 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 78529563 is about 8861.6907528981. The cubic root of 78529563 is about 428.2306291162.

The spelling of 78529563 in words is "seventy-eight million, five hundred twenty-nine thousand, five hundred sixty-three".