1663154442 has 24 divisors (see below), whose sum is σ = 3605270916. Its totient is φ = 554112576.

The previous prime is 1663154429. The next prime is 1663154459. The reversal of 1663154442 is 2444513661.

1663154442 is a `hidden beast` number, since 1 + 6 + 63 + 154 + 442 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1143724761 + 519429681 = 33819^2 + 22791^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1663154397 and 1663154406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16848 + ... + 60084.

Almost surely, 2^1663154442 is an apocalyptic number.

1663154442 is an abundant number, since it is smaller than the sum of its proper divisors (1942116474).

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

1663154442 is a wasteful number, since it uses less digits than its factorization.

1663154442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45382 (or 45379 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 1663154442 is about 40781.7905688311. The cubic root of 1663154442 is about 1184.7976752261.

The spelling of 1663154442 in words is "one billion, six hundred sixty-three million, one hundred fifty-four thousand, four hundred forty-two".