21463257064441 has 8 divisors (see below), whose sum is σ = 22157365551104. Its totient is φ = 20769257662560.

The previous prime is 21463257064429. The next prime is 21463257064471. The reversal of 21463257064441 is 14446075236412.

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 21463257064441 - 2¹³ = 21463257056249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21463257064471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26871225 + ... + 27658438.

It is an arithmetic number, because the mean of its divisors is an integer number (2769670693888).

Almost surely, 2^{21463257064441} is an apocalyptic number.

It is an amenable number.

21463257064441 is a deficient number, since it is larger than the sum of its proper divisors (694108486663).

21463257064441 is a wasteful number, since it uses less digits than its factorization.

21463257064441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54542391.

The product of its (nonzero) digits is 3870720, while the sum is 49.

The spelling of 21463257064441 in words is "twenty-one trillion, four hundred sixty-three billion, two hundred fifty-seven million, sixty-four thousand, four hundred forty-one".