11661553716 has 48 divisors (see below), whose sum is σ = 29175632640. Its totient is φ = 3612211200.

The previous prime is 11661553693. The next prime is 11661553741. The reversal of 11661553716 is 61735516611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345685 + ... + 377916.

It is an arithmetic number, because the mean of its divisors is an integer number (607825680).

Almost surely, 2^11661553716 is an apocalyptic number.

It is an amenable number.

11661553716 is an abundant number, since it is smaller than the sum of its proper divisors (17514078924).

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

11661553716 is a wasteful number, since it uses less digits than its factorization.

11661553716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723704 (or 723702 counting only the distinct ones).

The product of its digits is 113400, while the sum is 42.

The spelling of 11661553716 in words is "eleven billion, six hundred sixty-one million, five hundred fifty-three thousand, seven hundred sixteen".