1563725880 has 96 divisors (see below), whose sum is σ = 5087075760. Its totient is φ = 416586240.

The previous prime is 1563725879. The next prime is 1563725887. The reversal of 1563725880 is 885273651.

1563725880 is a `hidden beast` number, since 1 + 5 + 63 + 7 + 2 + 588 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1563725887) 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 23 ways as a sum of consecutive naturals, for example, 619020 + ... + 621540.

Almost surely, 2^1563725880 is an apocalyptic number.

1563725880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1563725880 is an abundant number, since it is smaller than the sum of its proper divisors (3523349880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1563725880 is a wasteful number, since it uses less digits than its factorization.

1563725880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4261 (or 4254 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 1563725880 is about 39543.9740036330. The cubic root of 1563725880 is about 1160.7005973901.

The spelling of 1563725880 in words is "one billion, five hundred sixty-three million, seven hundred twenty-five thousand, eight hundred eighty".