1663285158020 has 24 divisors (see below), whose sum is σ = 3492947475864. Its totient is φ = 665304797696.

The previous prime is 1663285158013. The next prime is 1663285158037. The reversal of 1663285158020 is 208515823661.

It can be written as a sum of positive squares in 4 ways, for example, as 56632576576 + 1606652581444 = 237976^2 + 1267538^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 997622 + ... + 2078898.

It is an arithmetic number, because the mean of its divisors is an integer number (145539478161).

Almost surely, 2^{1663285158020} is an apocalyptic number.

1663285158020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1663285158020 is an abundant number, since it is smaller than the sum of its proper divisors (1829662317844).

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

1663285158020 is a wasteful number, since it uses less digits than its factorization.

1663285158020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158199 (or 1158197 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 1663285158020 in words is "one trillion, six hundred sixty-three billion, two hundred eighty-five million, one hundred fifty-eight thousand, twenty".