63636477387 has 16 divisors (see below), whose sum is σ = 97001422080. Its totient is φ = 36351869472.

The previous prime is 63636477379. The next prime is 63636477389. The reversal of 63636477387 is 78377463636.

It is a happy number.

It is not a de Polignac number, because 63636477387 - 2³ = 63636477379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63636477387.

It is not an unprimeable number, because it can be changed into a prime (63636477389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426712 + ... + 556197.

It is an arithmetic number, because the mean of its divisors is an integer number (6062588880).

Almost surely, 2^63636477387 is an apocalyptic number.

63636477387 is a deficient number, since it is larger than the sum of its proper divisors (33364944693).

63636477387 is a wasteful number, since it uses less digits than its factorization.

63636477387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986002.

The product of its digits is 64012032, while the sum is 60.

The spelling of 63636477387 in words is "sixty-three billion, six hundred thirty-six million, four hundred seventy-seven thousand, three hundred eighty-seven".