63942421995 has 24 divisors (see below), whose sum is σ = 110847771216. Its totient is φ = 34098243648.

The previous prime is 63942421957. The next prime is 63942422009. The reversal of 63942421995 is 59912424936.

63942421995 is a `hidden beast` number, since 6 + 394 + 242 + 1 + 9 + 9 + 5 = 666.

It is not a de Polignac number, because 63942421995 - 2⁹ = 63942421483 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 279409 + ... + 453821.

It is an arithmetic number, because the mean of its divisors is an integer number (4618657134).

Almost surely, 2^63942421995 is an apocalyptic number.

63942421995 is a deficient number, since it is larger than the sum of its proper divisors (46905349221).

63942421995 is a wasteful number, since it uses less digits than its factorization.

63942421995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182571 (or 182568 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The spelling of 63942421995 in words is "sixty-three billion, nine hundred forty-two million, four hundred twenty-one thousand, nine hundred ninety-five".