63746036440 has 32 divisors (see below), whose sum is σ = 143450714160. Its totient is φ = 25494480000.

The previous prime is 63746036437. The next prime is 63746036449. The reversal of 63746036440 is 4463064736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63746036449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146815 + ... + 386065.

Almost surely, 2^63746036440 is an apocalyptic number.

It is an amenable number.

63746036440 is an abundant number, since it is smaller than the sum of its proper divisors (79704677720).

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

63746036440 is a wasteful number, since it uses less digits than its factorization.

63746036440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245923 (or 245919 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 43.

The spelling of 63746036440 in words is "sixty-three billion, seven hundred forty-six million, thirty-six thousand, four hundred forty".