1663541049 has 16 divisors (see below), whose sum is σ = 2267504640. Its totient is φ = 1084500240.

The previous prime is 1663541041. The next prime is 1663541059. The reversal of 1663541049 is 9401453661.

It is not a de Polignac number, because 1663541049 - 2³ = 1663541041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1663540998 and 1663541016.

It is not an unprimeable number, because it can be changed into a prime (1663541041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9204 + ... + 58410.

It is an arithmetic number, because the mean of its divisors is an integer number (141719040).

Almost surely, 2^1663541049 is an apocalyptic number.

It is an amenable number.

1663541049 is a deficient number, since it is larger than the sum of its proper divisors (603963591).

1663541049 is a wasteful number, since it uses less digits than its factorization.

1663541049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49460.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 1663541049 is about 40786.5302397740. The cubic root of 1663541049 is about 1184.8894717897.

The spelling of 1663541049 in words is "one billion, six hundred sixty-three million, five hundred forty-one thousand, forty-nine".