78145115 has 16 divisors (see below), whose sum is σ = 96279840. Its totient is φ = 60867840.

The previous prime is 78145097. The next prime is 78145117. The reversal of 78145115 is 51154187.

It is not a de Polignac number, because 78145115 - 2⁶ = 78145051 is a prime.

It is a super-2 number, since 2×78145115² = 12213317996726450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78145117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28505 + ... + 31125.

It is an arithmetic number, because the mean of its divisors is an integer number (6017490).

Almost surely, 2^78145115 is an apocalyptic number.

78145115 is a deficient number, since it is larger than the sum of its proper divisors (18134725).

78145115 is a wasteful number, since it uses less digits than its factorization.

78145115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782.

The product of its digits is 5600, while the sum is 32.

The square root of 78145115 is about 8839.9725678307. The cubic root of 78145115 is about 427.5306727647.

The spelling of 78145115 in words is "seventy-eight million, one hundred forty-five thousand, one hundred fifteen".