994153136138 has 4 divisors (see below), whose sum is σ = 1491229704210. Its totient is φ = 497076568068.

The previous prime is 994153136129. The next prime is 994153136161. The reversal of 994153136138 is 831631351499.

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., 639476906929 + 354676229209 = 799673^2 + 595547^2 .

It is a super-4 number, since 4×994153136138⁴ (a number of 49 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 994153136138.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248538284033 + ... + 248538284036.

Almost surely, 2^994153136138 is an apocalyptic number.

994153136138 is a deficient number, since it is larger than the sum of its proper divisors (497076568072).

994153136138 is a wasteful number, since it uses less digits than its factorization.

994153136138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497076568071.

The product of its digits is 2099520, while the sum is 53.

The spelling of 994153136138 in words is "nine hundred ninety-four billion, one hundred fifty-three million, one hundred thirty-six thousand, one hundred thirty-eight".