21456264061 has 8 divisors (see below), whose sum is σ = 21488744448. Its totient is φ = 21423810000.

The previous prime is 21456264023. The next prime is 21456264107. The reversal of 21456264061 is 16046265412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21456264061 - 2¹³ = 21456255869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21456264061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21456264761) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2102391 + ... + 2112571.

It is an arithmetic number, because the mean of its divisors is an integer number (2686093056).

Almost surely, 2^21456264061 is an apocalyptic number.

It is an amenable number.

21456264061 is a deficient number, since it is larger than the sum of its proper divisors (32480387).

21456264061 is a wasteful number, since it uses less digits than its factorization.

21456264061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13163.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 21456264061 in words is "twenty-one billion, four hundred fifty-six million, two hundred sixty-four thousand, sixty-one".