838202353138 has 4 divisors (see below), whose sum is σ = 1257303529710. Its totient is φ = 419101176568.

The previous prime is 838202353049. The next prime is 838202353147. The reversal of 838202353138 is 831353202838.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 813887252649 + 24315100489 = 902157^2 + 155933^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209550588283 + ... + 209550588286.

Almost surely, 2^838202353138 is an apocalyptic number.

838202353138 is a deficient number, since it is larger than the sum of its proper divisors (419101176572).

838202353138 is a wasteful number, since it uses less digits than its factorization.

838202353138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419101176571.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 838202353138 in words is "eight hundred thirty-eight billion, two hundred two million, three hundred fifty-three thousand, one hundred thirty-eight".