1663636553260 has 24 divisors (see below), whose sum is σ = 3811240104336. Its totient is φ = 604958746560.

The previous prime is 1663636553231. The next prime is 1663636553261. The reversal of 1663636553260 is 623556363661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1663636553198 and 1663636553207.

It is not an unprimeable number, because it can be changed into a prime (1663636553261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3780991947 + ... + 3780992386.

It is an arithmetic number, because the mean of its divisors is an integer number (158801671014).

Almost surely, 2^{1663636553260} is an apocalyptic number.

1663636553260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1663636553260 is an abundant number, since it is smaller than the sum of its proper divisors (2147603551076).

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

1663636553260 is a wasteful number, since it uses less digits than its factorization.

1663636553260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7561984353 (or 7561984351 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 52.

The spelling of 1663636553260 in words is "one trillion, six hundred sixty-three billion, six hundred thirty-six million, five hundred fifty-three thousand, two hundred sixty".