63928734761 has 8 divisors (see below), whose sum is σ = 66918688704. Its totient is φ = 60956317840.

The previous prime is 63928734757. The next prime is 63928734797. The reversal of 63928734761 is 16743782936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63928734761 - 2² = 63928734757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63928734697 and 63928734706.

It is not an unprimeable number, because it can be changed into a prime (63928334761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4376795 + ... + 4391376.

It is an arithmetic number, because the mean of its divisors is an integer number (8364836088).

Almost surely, 2^63928734761 is an apocalyptic number.

It is an amenable number.

63928734761 is a deficient number, since it is larger than the sum of its proper divisors (2989953943).

63928734761 is a wasteful number, since it uses less digits than its factorization.

63928734761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8768511.

The product of its digits is 9144576, while the sum is 56.

The spelling of 63928734761 in words is "sixty-three billion, nine hundred twenty-eight million, seven hundred thirty-four thousand, seven hundred sixty-one".