55663616987 has 8 divisors (see below), whose sum is σ = 64295942832. Its totient is φ = 47626624000.

The previous prime is 55663616977. The next prime is 55663616989. The reversal of 55663616987 is 78961636655.

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

It is a cyclic number.

It is not a de Polignac number, because 55663616987 - 2⁸ = 55663616731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55663616989) 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, 148833014 + ... + 148833387.

It is an arithmetic number, because the mean of its divisors is an integer number (8036992854).

Almost surely, 2^55663616987 is an apocalyptic number.

55663616987 is a deficient number, since it is larger than the sum of its proper divisors (8632325845).

55663616987 is a wasteful number, since it uses less digits than its factorization.

55663616987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297666429.

The product of its digits is 48988800, while the sum is 62.

The spelling of 55663616987 in words is "fifty-five billion, six hundred sixty-three million, six hundred sixteen thousand, nine hundred eighty-seven".