78886545 has 16 divisors (see below), whose sum is σ = 133643520. Its totient is φ = 39597824.

The previous prime is 78886487. The next prime is 78886547. The reversal of 78886545 is 54568887.

It is a cyclic number.

It is not a de Polignac number, because 78886545 - 2⁷ = 78886417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (78886547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154425 + ... + 154934.

It is an arithmetic number, because the mean of its divisors is an integer number (8352720).

Almost surely, 2^78886545 is an apocalyptic number.

It is an amenable number.

78886545 is a deficient number, since it is larger than the sum of its proper divisors (54756975).

78886545 is a wasteful number, since it uses less digits than its factorization.

78886545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309384.

The product of its digits is 2150400, while the sum is 51.

The square root of 78886545 is about 8881.8097817956. The cubic root of 78886545 is about 428.8785361488.

The spelling of 78886545 in words is "seventy-eight million, eight hundred eighty-six thousand, five hundred forty-five".