74128563 has 12 divisors (see below), whose sum is σ = 111730320. Its totient is φ = 47270256.

The previous prime is 74128559. The next prime is 74128567. The reversal of 74128563 is 36582147.

74128563 is a `hidden beast` number, since 74 + 1 + 28 + 563 = 666.

It is an interprime number because it is at equal distance from previous prime (74128559) and next prime (74128567).

It is not a de Polignac number, because 74128563 - 2² = 74128559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74128567) 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, 178848 + ... + 179261.

It is an arithmetic number, because the mean of its divisors is an integer number (9310860).

Almost surely, 2^74128563 is an apocalyptic number.

74128563 is a deficient number, since it is larger than the sum of its proper divisors (37601757).

74128563 is a wasteful number, since it uses less digits than its factorization.

74128563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358138 (or 358135 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 74128563 is about 8609.7945968531. The cubic root of 74128563 is about 420.0766356756.

It can be divided in two parts, 74128 and 563, that added together give a triangular number (74691 = T₃₈₆).

The spelling of 74128563 in words is "seventy-four million, one hundred twenty-eight thousand, five hundred sixty-three".