78885545 has 16 divisors (see below), whose sum is σ = 98703360. Its totient is φ = 60456000.

The previous prime is 78885503. The next prime is 78885553. The reversal of 78885545 is 54558887.

It is not a de Polignac number, because 78885545 - 2¹⁰ = 78884521 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78885493 and 78885502.

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, 13136 + ... + 18174.

It is an arithmetic number, because the mean of its divisors is an integer number (6168960).

Almost surely, 2^78885545 is an apocalyptic number.

It is an amenable number.

78885545 is a deficient number, since it is larger than the sum of its proper divisors (19817815).

78885545 is a wasteful number, since it uses less digits than its factorization.

78885545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5176.

The product of its digits is 1792000, while the sum is 50.

The square root of 78885545 is about 8881.7534867840. The cubic root of 78885545 is about 428.8767239245.

The spelling of 78885545 in words is "seventy-eight million, eight hundred eighty-five thousand, five hundred forty-five".