11656543353540 has 24 divisors (see below), whose sum is σ = 32638321390080. Its totient is φ = 3108411560928.

The previous prime is 11656543353527. The next prime is 11656543353551. The reversal of 11656543353540 is 4535334565611.

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, 97137861220 + ... + 97137861339.

It is an arithmetic number, because the mean of its divisors is an integer number (1359930057920).

Almost surely, 2^{11656543353540} is an apocalyptic number.

11656543353540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11656543353540 is an abundant number, since it is smaller than the sum of its proper divisors (20981778036540).

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

11656543353540 is a wasteful number, since it uses less digits than its factorization.

11656543353540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194275722571 (or 194275722569 counting only the distinct ones).

The product of its (nonzero) digits is 9720000, while the sum is 51.

The spelling of 11656543353540 in words is "eleven trillion, six hundred fifty-six billion, five hundred forty-three million, three hundred fifty-three thousand, five hundred forty".