42915663 has 20 divisors (see below), whose sum is σ = 73267920. Its totient is φ = 24522912.

The previous prime is 42915629. The next prime is 42915683. The reversal of 42915663 is 36651924.

It is a happy number.

42915663 is a `hidden beast` number, since 4 + 2 + 91 + 566 + 3 = 666.

It is not a de Polignac number, because 42915663 - 2²⁴ = 26138447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42915683) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 37278 + ... + 38411.

It is an arithmetic number, because the mean of its divisors is an integer number (3663396).

Almost surely, 2^42915663 is an apocalyptic number.

42915663 is a deficient number, since it is larger than the sum of its proper divisors (30352257).

42915663 is an equidigital number, since it uses as much as digits as its factorization.

42915663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75708 (or 75699 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 42915663 is about 6551.0047321003. The cubic root of 42915663 is about 350.1106126578.

The spelling of 42915663 in words is "forty-two million, nine hundred fifteen thousand, six hundred sixty-three".