11663551461540 has 96 divisors (see below), whose sum is σ = 35979589376640. Its totient is φ = 2799532288000.

The previous prime is 11663551461533. The next prime is 11663551461563. The reversal of 11663551461540 is 4516415536611.

It is a self number, because there is not a number n which added to its sum of digits gives 11663551461540.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87418725 + ... + 87552044.

It is an arithmetic number, because the mean of its divisors is an integer number (374787389340).

Almost surely, 2^{11663551461540} is an apocalyptic number.

11663551461540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11663551461540 is an abundant number, since it is smaller than the sum of its proper divisors (24316037915100).

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

11663551461540 is a wasteful number, since it uses less digits than its factorization.

11663551461540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174970893 (or 174970891 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 48.

The spelling of 11663551461540 in words is "eleven trillion, six hundred sixty-three billion, five hundred fifty-one million, four hundred sixty-one thousand, five hundred forty".