63441654691 has 4 divisors (see below), whose sum is σ = 63808369632. Its totient is φ = 63074939752.

The previous prime is 63441654673. The next prime is 63441654701. The reversal of 63441654691 is 19645614436.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63441654691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63441654611) 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, 183357211 + ... + 183357556.

It is an arithmetic number, because the mean of its divisors is an integer number (15952092408).

Almost surely, 2^63441654691 is an apocalyptic number.

63441654691 is a deficient number, since it is larger than the sum of its proper divisors (366714941).

63441654691 is a wasteful number, since it uses less digits than its factorization.

63441654691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366714940.

The product of its digits is 1866240, while the sum is 49.

The spelling of 63441654691 in words is "sixty-three billion, four hundred forty-one million, six hundred fifty-four thousand, six hundred ninety-one".