63445556669 has 8 divisors (see below), whose sum is σ = 70246370208. Its totient is φ = 56816915760.

The previous prime is 63445556663. The next prime is 63445556677. The reversal of 63445556669 is 96665554436.

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

It is not a de Polignac number, because 63445556669 - 2⁴ = 63445556653 is a prime.

It is a super-2 number, since 2×63445556669² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63445556663) 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, 43042382 + ... + 43043855.

It is an arithmetic number, because the mean of its divisors is an integer number (8780796276).

Almost surely, 2^63445556669 is an apocalyptic number.

It is an amenable number.

63445556669 is a deficient number, since it is larger than the sum of its proper divisors (6800813539).

63445556669 is a wasteful number, since it uses less digits than its factorization.

63445556669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86086315.

The product of its digits is 69984000, while the sum is 59.

The spelling of 63445556669 in words is "sixty-three billion, four hundred forty-five million, five hundred fifty-six thousand, six hundred sixty-nine".