78615145 has 8 divisors (see below), whose sum is σ = 107815104. Its totient is φ = 53907504.

The previous prime is 78615133. The next prime is 78615151. The reversal of 78615145 is 54151687.

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

It is not a de Polignac number, because 78615145 - 2⁵ = 78615113 is a prime.

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, 1123039 + ... + 1123108.

It is an arithmetic number, because the mean of its divisors is an integer number (13476888).

Almost surely, 2^78615145 is an apocalyptic number.

It is an amenable number.

78615145 is a deficient number, since it is larger than the sum of its proper divisors (29199959).

78615145 is a wasteful number, since it uses less digits than its factorization.

78615145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246159.

The product of its digits is 33600, while the sum is 37.

The square root of 78615145 is about 8866.5182005114. The cubic root of 78615145 is about 428.3861354290.

It can be divided in two parts, 786 and 15145, that added together give a triangular number (15931 = T₁₇₈).

The spelling of 78615145 in words is "seventy-eight million, six hundred fifteen thousand, one hundred forty-five".