7138578877839 has 24 divisors (see below), whose sum is σ = 10856103730160. Its totient is φ = 4507693794432.

The previous prime is 7138578877819. The next prime is 7138578877873. The reversal of 7138578877839 is 9387788758317.

7138578877839 is a `hidden beast` number, since 7 + 1 + 3 + 8 + 578 + 8 + 7 + 7 + 8 + 39 = 666.

It is not a de Polignac number, because 7138578877839 - 2⁹ = 7138578877327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7138578877819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3208024 + ... + 4956669.

Almost surely, 2^{7138578877839} is an apocalyptic number.

7138578877839 is a deficient number, since it is larger than the sum of its proper divisors (3717524852321).

7138578877839 is a wasteful number, since it uses less digits than its factorization.

7138578877839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8169831 (or 8169828 counting only the distinct ones).

The product of its digits is 3982970880, while the sum is 81.

The spelling of 7138578877839 in words is "seven trillion, one hundred thirty-eight billion, five hundred seventy-eight million, eight hundred seventy-seven thousand, eight hundred thirty-nine".