63842649 has 32 divisors (see below), whose sum is σ = 95096064. Its totient is φ = 37843200.

The previous prime is 63842621. The next prime is 63842657. The reversal of 63842649 is 94624836.

It is a happy number.

It is not a de Polignac number, because 63842649 - 2¹⁶ = 63777113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63842649.

It is not an unprimeable number, because it can be changed into a prime (63842689) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217747 + ... + 218039.

It is an arithmetic number, because the mean of its divisors is an integer number (2971752).

Almost surely, 2^63842649 is an apocalyptic number.

It is an amenable number.

63842649 is a deficient number, since it is larger than the sum of its proper divisors (31253415).

63842649 is a wasteful number, since it uses less digits than its factorization.

63842649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497.

The product of its digits is 248832, while the sum is 42.

The square root of 63842649 is about 7990.1595102977. The cubic root of 63842649 is about 399.6719163931.

The spelling of 63842649 in words is "sixty-three million, eight hundred forty-two thousand, six hundred forty-nine".