11561421695 has 16 divisors (see below), whose sum is σ = 14221025280. Its totient is φ = 9017875200.

The previous prime is 11561421649. The next prime is 11561421731. The reversal of 11561421695 is 59612416511.

It is not a de Polignac number, because 11561421695 - 2⁶ = 11561421631 is a prime.

It is a super-3 number, since 3×11561421695³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

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, 325250 + ... + 359040.

It is an arithmetic number, because the mean of its divisors is an integer number (888814080).

Almost surely, 2^11561421695 is an apocalyptic number.

11561421695 is a deficient number, since it is larger than the sum of its proper divisors (2659603585).

11561421695 is a wasteful number, since it uses less digits than its factorization.

11561421695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35506.

The product of its digits is 64800, while the sum is 41.

The spelling of 11561421695 in words is "eleven billion, five hundred sixty-one million, four hundred twenty-one thousand, six hundred ninety-five".