78135875 has 8 divisors (see below), whose sum is σ = 97513728. Its totient is φ = 62508600.

The previous prime is 78135839. The next prime is 78135907. The reversal of 78135875 is 57853187.

It is not a de Polignac number, because 78135875 - 2¹⁶ = 78070339 is a prime.

It is a super-2 number, since 2×78135875² = 12210429924031250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312419 + ... + 312668.

It is an arithmetic number, because the mean of its divisors is an integer number (12189216).

Almost surely, 2^78135875 is an apocalyptic number.

78135875 is a deficient number, since it is larger than the sum of its proper divisors (19377853).

78135875 is an equidigital number, since it uses as much as digits as its factorization.

78135875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625102 (or 625092 counting only the distinct ones).

The product of its digits is 235200, while the sum is 44.

The square root of 78135875 is about 8839.4499263246. The cubic root of 78135875 is about 427.5138214698.

The spelling of 78135875 in words is "seventy-eight million, one hundred thirty-five thousand, eight hundred seventy-five".