1663562743672 has 16 divisors (see below), whose sum is σ = 3219798859200. Its totient is φ = 804949714560.

The previous prime is 1663562743657. The next prime is 1663562743679. The reversal of 1663562743672 is 2763472653661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663562743679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3353956897 + ... + 3353957392.

It is an arithmetic number, because the mean of its divisors is an integer number (201237428700).

Almost surely, 2^{1663562743672} is an apocalyptic number.

It is an amenable number.

1663562743672 is a deficient number, since it is larger than the sum of its proper divisors (1556236115528).

1663562743672 is a wasteful number, since it uses less digits than its factorization.

1663562743672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707914326 (or 6707914322 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 58.

The spelling of 1663562743672 in words is "one trillion, six hundred sixty-three billion, five hundred sixty-two million, seven hundred forty-three thousand, six hundred seventy-two".