63542643 has 4 divisors (see below), whose sum is σ = 84723528. Its totient is φ = 42361760.

The previous prime is 63542639. The next prime is 63542659. The reversal of 63542643 is 34624536.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63542643 - 2² = 63542639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63542603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10590438 + ... + 10590443.

It is an arithmetic number, because the mean of its divisors is an integer number (21180882).

Almost surely, 2^63542643 is an apocalyptic number.

63542643 is a deficient number, since it is larger than the sum of its proper divisors (21180885).

63542643 is a wasteful number, since it uses less digits than its factorization.

63542643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21180884.

The product of its digits is 51840, while the sum is 33.

The square root of 63542643 is about 7971.3639359899. The cubic root of 63542643 is about 399.0448941639.

The spelling of 63542643 in words is "sixty-three million, five hundred forty-two thousand, six hundred forty-three".