5138778893 has 8 divisors (see below), whose sum is σ = 5412997920. Its totient is φ = 4864935600.

The previous prime is 5138778839. The next prime is 5138778923. The reversal of 5138778893 is 3988778315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5138778893 is a prime.

It is a super-2 number, since 2×5138778893² = 52814097022284610898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5138778193) 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, 65630 + ... + 120767.

It is an arithmetic number, because the mean of its divisors is an integer number (676624740).

Almost surely, 2^5138778893 is an apocalyptic number.

It is an amenable number.

5138778893 is a deficient number, since it is larger than the sum of its proper divisors (274219027).

5138778893 is a wasteful number, since it uses less digits than its factorization.

5138778893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187867.

The product of its digits is 10160640, while the sum is 59.

The square root of 5138778893 is about 71685.2766821751. The cubic root of 5138778893 is about 1725.6523632690.

The spelling of 5138778893 in words is "five billion, one hundred thirty-eight million, seven hundred seventy-eight thousand, eight hundred ninety-three".