634023144638 has 16 divisors (see below), whose sum is σ = 1024978522176. Its totient is φ = 292401127200.

The previous prime is 634023144631. The next prime is 634023144659. The reversal of 634023144638 is 836441320436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634023144631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9338006 + ... + 9405657.

It is an arithmetic number, because the mean of its divisors is an integer number (64061157636).

Almost surely, 2^634023144638 is an apocalyptic number.

634023144638 is a deficient number, since it is larger than the sum of its proper divisors (390955377538).

634023144638 is a wasteful number, since it uses less digits than its factorization.

634023144638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18744979.

The product of its (nonzero) digits is 995328, while the sum is 44.

The spelling of 634023144638 in words is "six hundred thirty-four billion, twenty-three million, one hundred forty-four thousand, six hundred thirty-eight".