42611643 has 16 divisors (see below), whose sum is σ = 65306400. Its totient is φ = 27427680.

The previous prime is 42611641. The next prime is 42611693. The reversal of 42611643 is 34611624.

42611643 is a `hidden beast` number, since 4 + 2 + 6 + 11 + 643 = 666.

It is not a de Polignac number, because 42611643 - 2¹ = 42611641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (42611641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26428 + ... + 27993.

It is an arithmetic number, because the mean of its divisors is an integer number (4081650).

Almost surely, 2^42611643 is an apocalyptic number.

42611643 is a deficient number, since it is larger than the sum of its proper divisors (22694757).

42611643 is a wasteful number, since it uses less digits than its factorization.

42611643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54459 (or 54453 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 42611643 is about 6527.7594165226. The cubic root of 42611643 is about 349.2819100256.

The spelling of 42611643 in words is "forty-two million, six hundred eleven thousand, six hundred forty-three".