1563651942 has 16 divisors (see below), whose sum is σ = 3311263152. Its totient is φ = 490557440.

The previous prime is 1563651937. The next prime is 1563651983. The reversal of 1563651942 is 2491563651.

It is a junction number, because it is equal to n+sod(n) for n = 1563651894 and 1563651903.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7664859 + ... + 7665062.

It is an arithmetic number, because the mean of its divisors is an integer number (206953947).

Almost surely, 2^1563651942 is an apocalyptic number.

1563651942 is an abundant number, since it is smaller than the sum of its proper divisors (1747611210).

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

1563651942 is a wasteful number, since it uses less digits than its factorization.

1563651942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15329943.

The product of its digits is 194400, while the sum is 42.

The square root of 1563651942 is about 39543.0391093047. The cubic root of 1563651942 is about 1160.6823032133.

The spelling of 1563651942 in words is "one billion, five hundred sixty-three million, six hundred fifty-one thousand, nine hundred forty-two".