634988149863 has 16 divisors (see below), whose sum is σ = 855608920320. Its totient is φ = 418866538176.

The previous prime is 634988149847. The next prime is 634988149903. The reversal of 634988149863 is 368941889436.

It is not a de Polignac number, because 634988149863 - 2⁴ = 634988149847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634988149843) 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, 2390083 + ... + 2642436.

It is an arithmetic number, because the mean of its divisors is an integer number (53475557520).

Almost surely, 2^634988149863 is an apocalyptic number.

634988149863 is a deficient number, since it is larger than the sum of its proper divisors (220620770457).

634988149863 is a wasteful number, since it uses less digits than its factorization.

634988149863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032966.

The product of its digits is 214990848, while the sum is 69.

The spelling of 634988149863 in words is "six hundred thirty-four billion, nine hundred eighty-eight million, one hundred forty-nine thousand, eight hundred sixty-three".