63487812661 has 8 divisors (see below), whose sum is σ = 78138846464. Its totient is φ = 50232115440.

The previous prime is 63487812643. The next prime is 63487812677. The reversal of 63487812661 is 16621878436.

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

It is not a de Polignac number, because 63487812661 - 2⁷ = 63487812533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63487812599 and 63487812608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63487812611) 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, 348834045 + ... + 348834226.

It is an arithmetic number, because the mean of its divisors is an integer number (9767355808).

Almost surely, 2^63487812661 is an apocalyptic number.

It is an amenable number.

63487812661 is a deficient number, since it is larger than the sum of its proper divisors (14651033803).

63487812661 is a wasteful number, since it uses less digits than its factorization.

63487812661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697668291.

The product of its digits is 2322432, while the sum is 52.

The spelling of 63487812661 in words is "sixty-three billion, four hundred eighty-seven million, eight hundred twelve thousand, six hundred sixty-one".