63910721948 has 6 divisors (see below), whose sum is σ = 111843763416. Its totient is φ = 31955360972.

The previous prime is 63910721947. The next prime is 63910722049. The reversal of 63910721948 is 84912701936.

It is a junction number, because it is equal to n+sod(n) for n = 63910721896 and 63910721905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63910721947) 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 as a sum of consecutive naturals, namely, 7988840240 + ... + 7988840247.

It is an arithmetic number, because the mean of its divisors is an integer number (18640627236).

Almost surely, 2^63910721948 is an apocalyptic number.

It is an amenable number.

63910721948 is a deficient number, since it is larger than the sum of its proper divisors (47933041468).

63910721948 is a wasteful number, since it uses less digits than its factorization.

63910721948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15977680491 (or 15977680489 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 63910721948 in words is "sixty-three billion, nine hundred ten million, seven hundred twenty-one thousand, nine hundred forty-eight".