7849739509178 has 32 divisors (see below), whose sum is σ = 13710888423936. Its totient is φ = 3300628750848.

The previous prime is 7849739509121. The next prime is 7849739509219. The reversal of 7849739509178 is 8719059379487.

It is a Smith number, since the sum of its digits (77) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 7849739509099 and 7849739509108.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49332575 + ... + 49491437.

It is an arithmetic number, because the mean of its divisors is an integer number (428465263248).

Almost surely, 2^{7849739509178} is an apocalyptic number.

7849739509178 is a deficient number, since it is larger than the sum of its proper divisors (5861148914758).

7849739509178 is a wasteful number, since it uses less digits than its factorization.

7849739509178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225518.

The product of its (nonzero) digits is 960180480, while the sum is 77.

The spelling of 7849739509178 in words is "seven trillion, eight hundred forty-nine billion, seven hundred thirty-nine million, five hundred nine thousand, one hundred seventy-eight".