63640106551 has 8 divisors (see below), whose sum is σ = 73652203520. Its totient is φ = 53858172888.

The previous prime is 63640106549. The next prime is 63640106599. The reversal of 63640106551 is 15560104636.

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

It is a cyclic number.

It is not a de Polignac number, because 63640106551 - 2¹ = 63640106549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63640106551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63640106501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57540231 + ... + 57541336.

It is an arithmetic number, because the mean of its divisors is an integer number (9206525440).

Almost surely, 2^63640106551 is an apocalyptic number.

63640106551 is a deficient number, since it is larger than the sum of its proper divisors (10012096969).

63640106551 is a wasteful number, since it uses less digits than its factorization.

63640106551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115081653.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 63640106551 in words is "sixty-three billion, six hundred forty million, one hundred six thousand, five hundred fifty-one".