55403916663 has 4 divisors (see below), whose sum is σ = 73871888888. Its totient is φ = 36935944440.

The previous prime is 55403916649. The next prime is 55403916709. The reversal of 55403916663 is 36661930455.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55403916663 - 2⁹ = 55403916151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55403911663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9233986108 + ... + 9233986113.

It is an arithmetic number, because the mean of its divisors is an integer number (18467972222).

Almost surely, 2^55403916663 is an apocalyptic number.

55403916663 is a deficient number, since it is larger than the sum of its proper divisors (18467972225).

55403916663 is a wasteful number, since it uses less digits than its factorization.

55403916663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18467972224.

The product of its (nonzero) digits is 1749600, while the sum is 48.

The spelling of 55403916663 in words is "fifty-five billion, four hundred three million, nine hundred sixteen thousand, six hundred sixty-three".