78661847563 has 8 divisors (see below), whose sum is σ = 84731896256. Its totient is φ = 72594532800.

The previous prime is 78661847479. The next prime is 78661847611. The reversal of 78661847563 is 36574816687.

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

It is a cyclic number.

It is not a de Polignac number, because 78661847563 - 2²⁵ = 78628293131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78661847963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 623523 + ... + 738988.

It is an arithmetic number, because the mean of its divisors is an integer number (10591487032).

Almost surely, 2^78661847563 is an apocalyptic number.

78661847563 is a deficient number, since it is larger than the sum of its proper divisors (6070048693).

78661847563 is a wasteful number, since it uses less digits than its factorization.

78661847563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366965.

The product of its digits is 40642560, while the sum is 61.

The spelling of 78661847563 in words is "seventy-eight billion, six hundred sixty-one million, eight hundred forty-seven thousand, five hundred sixty-three".