11561416405 has 32 divisors (see below), whose sum is σ = 17403291648. Its totient is φ = 7162862400.

The previous prime is 11561416379. The next prime is 11561416409. The reversal of 11561416405 is 50461416511.

It is not a de Polignac number, because 11561416405 - 2⁹ = 11561415893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11561416409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29361 + ... + 154870.

It is an arithmetic number, because the mean of its divisors is an integer number (543852864).

Almost surely, 2^11561416405 is an apocalyptic number.

It is an amenable number.

11561416405 is a deficient number, since it is larger than the sum of its proper divisors (5841875243).

11561416405 is a wasteful number, since it uses less digits than its factorization.

11561416405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184417.

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 11561416405 in words is "eleven billion, five hundred sixty-one million, four hundred sixteen thousand, four hundred five".