63690637480 has 32 divisors (see below), whose sum is σ = 144572121000. Its totient is φ = 25250799616.

The previous prime is 63690637429. The next prime is 63690637481. The reversal of 63690637480 is 8473609636.

It can be written as a sum of positive squares in 4 ways, for example, as 19936875204 + 43753762276 = 141198^2 + 209174^2 .

It is not an unprimeable number, because it can be changed into a prime (63690637481) 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, 7040905 + ... + 7049944.

Almost surely, 2^63690637480 is an apocalyptic number.

It is an amenable number.

63690637480 is an abundant number, since it is smaller than the sum of its proper divisors (80881483520).

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

63690637480 is a wasteful number, since it uses less digits than its factorization.

63690637480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14090973 (or 14090969 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 52.

The spelling of 63690637480 in words is "sixty-three billion, six hundred ninety million, six hundred thirty-seven thousand, four hundred eighty".