538358378638 has 16 divisors (see below), whose sum is σ = 849542742000. Its totient is φ = 255492110272.

The previous prime is 538358378611. The next prime is 538358378729. The reversal of 538358378638 is 836873853835.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78657943 + ... + 78664786.

It is an arithmetic number, because the mean of its divisors is an integer number (53096421375).

Almost surely, 2^538358378638 is an apocalyptic number.

538358378638 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

538358378638 is a deficient number, since it is larger than the sum of its proper divisors (311184363362).

538358378638 is a wasteful number, since it uses less digits than its factorization.

538358378638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157322819.

The product of its digits is 348364800, while the sum is 67.

The spelling of 538358378638 in words is "five hundred thirty-eight billion, three hundred fifty-eight million, three hundred seventy-eight thousand, six hundred thirty-eight".