21459041265 has 32 divisors (see below), whose sum is σ = 36505092096. Its totient is φ = 10726871040.

The previous prime is 21459041249. The next prime is 21459041267. The reversal of 21459041265 is 56214095412.

It is not a de Polignac number, because 21459041265 - 2⁴ = 21459041249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21459041267) 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, 113137 + ... + 236046.

It is an arithmetic number, because the mean of its divisors is an integer number (1140784128).

Almost surely, 2^21459041265 is an apocalyptic number.

It is an amenable number.

21459041265 is a deficient number, since it is larger than the sum of its proper divisors (15046050831).

21459041265 is a wasteful number, since it uses less digits than its factorization.

21459041265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349449.

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 21459041265 in words is "twenty-one billion, four hundred fifty-nine million, forty-one thousand, two hundred sixty-five".