63404775440 has 40 divisors (see below), whose sum is σ = 147428778240. Its totient is φ = 25359729536.

The previous prime is 63404775437. The next prime is 63404775457. The reversal of 63404775440 is 4457740436.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 63404775391 and 63404775400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1163687 + ... + 1216953.

It is an arithmetic number, because the mean of its divisors is an integer number (3685719456).

Almost surely, 2^63404775440 is an apocalyptic number.

It is an amenable number.

63404775440 is an abundant number, since it is smaller than the sum of its proper divisors (84024002800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63404775440 is a wasteful number, since it uses less digits than its factorization.

63404775440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68159 (or 68153 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 44.

The spelling of 63404775440 in words is "sixty-three billion, four hundred four million, seven hundred seventy-five thousand, four hundred forty".