1563427778878 has 24 divisors (see below), whose sum is σ = 2847092413392. Its totient is φ = 630626329344.

The previous prime is 1563427778819. The next prime is 1563427778879. The reversal of 1563427778878 is 8788777243651.

It is a self number, because there is not a number n which added to its sum of digits gives 1563427778878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1563427778879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193202551 + ... + 193210642.

It is an arithmetic number, because the mean of its divisors is an integer number (118628850558).

Almost surely, 2^{1563427778878} is an apocalyptic number.

1563427778878 is a deficient number, since it is larger than the sum of its proper divisors (1283664634514).

1563427778878 is a wasteful number, since it uses less digits than its factorization.

1563427778878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386413236 (or 386413219 counting only the distinct ones).

The product of its digits is 885104640, while the sum is 73.

The spelling of 1563427778878 in words is "one trillion, five hundred sixty-three billion, four hundred twenty-seven million, seven hundred seventy-eight thousand, eight hundred seventy-eight".