63646440051111 has 16 divisors (see below), whose sum is σ = 89484778880640. Its totient is φ = 40127352726240.

The previous prime is 63646440051091. The next prime is 63646440051127. The reversal of 63646440051111 is 11115004464636.

It is not a de Polignac number, because 63646440051111 - 2⁵ = 63646440051079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63646440058111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 977729460 + ... + 977794553.

It is an arithmetic number, because the mean of its divisors is an integer number (5592798680040).

Almost surely, 2^{63646440051111} is an apocalyptic number.

63646440051111 is a deficient number, since it is larger than the sum of its proper divisors (25838338829529).

63646440051111 is a wasteful number, since it uses less digits than its factorization.

63646440051111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955524606.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 63646440051111 in words is "sixty-three trillion, six hundred forty-six billion, four hundred forty million, fifty-one thousand, one hundred eleven".