55816463665 has 8 divisors (see below), whose sum is σ = 66990714408. Its totient is φ = 44645865600.

The previous prime is 55816463629. The next prime is 55816463669. The reversal of 55816463665 is 56636461855.

It can be written as a sum of positive squares in 4 ways, for example, as 39665103921 + 16151359744 = 199161^2 + 127088^2 .

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

It is not a de Polignac number, because 55816463665 - 2⁷ = 55816463537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55816463669) 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, 879436 + ... + 940765.

It is an arithmetic number, because the mean of its divisors is an integer number (8373839301).

Almost surely, 2^55816463665 is an apocalyptic number.

It is an amenable number.

55816463665 is a deficient number, since it is larger than the sum of its proper divisors (11174250743).

55816463665 is a wasteful number, since it uses less digits than its factorization.

55816463665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826339.

The product of its digits is 15552000, while the sum is 55.

The spelling of 55816463665 in words is "fifty-five billion, eight hundred sixteen million, four hundred sixty-three thousand, six hundred sixty-five".