1563978040 has 16 divisors (see below), whose sum is σ = 3518950680. Its totient is φ = 625591200.

The previous prime is 1563978029. The next prime is 1563978041. The reversal of 1563978040 is 408793651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1563978041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19549686 + ... + 19549765.

Almost surely, 2^1563978040 is an apocalyptic number.

1563978040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1563978040 is an abundant number, since it is smaller than the sum of its proper divisors (1954972640).

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

1563978040 is a wasteful number, since it uses less digits than its factorization.

1563978040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39099462 (or 39099458 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 1563978040 is about 39547.1622243619. The cubic root of 1563978040 is about 1160.7629839707.

The spelling of 1563978040 in words is "one billion, five hundred sixty-three million, nine hundred seventy-eight thousand, forty".