1663253550 has 108 divisors (see below), whose sum is σ = 5198245416. Its totient is φ = 380167200.

The previous prime is 1663253549. The next prime is 1663253561. The reversal of 1663253550 is 553523661.

1663253550 is a `hidden beast` number, since 16 + 63 + 2 + 535 + 50 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 15666 + ... + 59765.

It is an arithmetic number, because the mean of its divisors is an integer number (48131902).

Almost surely, 2^1663253550 is an apocalyptic number.

1663253550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1663253550 is an abundant number, since it is smaller than the sum of its proper divisors (3534991866).

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

1663253550 is a wasteful number, since it uses less digits than its factorization.

1663253550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75463 (or 75448 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The square root of 1663253550 is about 40783.0056518644. The cubic root of 1663253550 is about 1184.8212089387.

The spelling of 1663253550 in words is "one billion, six hundred sixty-three million, two hundred fifty-three thousand, five hundred fifty".