878764645 has 16 divisors (see below), whose sum is σ = 1172092032. Its totient is φ = 627040960.

The previous prime is 878764643. The next prime is 878764651. The reversal of 878764645 is 546467878.

It is not a de Polignac number, because 878764645 - 2¹ = 878764643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878764643) 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, 147817 + ... + 153646.

It is an arithmetic number, because the mean of its divisors is an integer number (73255752).

Almost surely, 2^878764645 is an apocalyptic number.

It is an amenable number.

878764645 is a deficient number, since it is larger than the sum of its proper divisors (293327387).

878764645 is a wasteful number, since it uses less digits than its factorization.

878764645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301532.

The product of its digits is 9031680, while the sum is 55.

The square root of 878764645 is about 29643.9647314593. The cubic root of 878764645 is about 957.8353444118.

The spelling of 878764645 in words is "eight hundred seventy-eight million, seven hundred sixty-four thousand, six hundred forty-five".