1663452450 has 120 divisors (see below), whose sum is σ = 5042244240. Its totient is φ = 403250400.

The previous prime is 1663452449. The next prime is 1663452457. The reversal of 1663452450 is 542543661.

1663452450 is a `hidden beast` number, since 16 + 634 + 5 + 2 + 4 + 5 + 0 = 666.

It is a super-2 number, since 2×1663452450² = 5534148106822005000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1663452457) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 25881 + ... + 63219.

It is an arithmetic number, because the mean of its divisors is an integer number (42018702).

Almost surely, 2^1663452450 is an apocalyptic number.

1663452450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1663452450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2521122120).

1663452450 is an abundant number, since it is smaller than the sum of its proper divisors (3378791790).

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

1663452450 is a wasteful number, since it uses less digits than its factorization.

1663452450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37374 (or 37360 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 1663452450 is about 40785.4440946767. Note that the first 3 decimals coincide. The cubic root of 1663452450 is about 1184.8684359625.

The spelling of 1663452450 in words is "one billion, six hundred sixty-three million, four hundred fifty-two thousand, four hundred fifty".