421945975265 has 8 divisors (see below), whose sum is σ = 506339148840. Its totient is φ = 337554127872.

The previous prime is 421945975259. The next prime is 421945975273. The reversal of 421945975265 is 562579549124.

It can be written as a sum of positive squares in 4 ways, for example, as 125157458176 + 296788517089 = 353776^2 + 544783^2 .

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 421945975265 - 2²² = 421941780961 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613121 + ... + 1104449.

It is an arithmetic number, because the mean of its divisors is an integer number (63292393605).

Almost surely, 2^421945975265 is an apocalyptic number.

It is an amenable number.

421945975265 is a deficient number, since it is larger than the sum of its proper divisors (84393173575).

421945975265 is a wasteful number, since it uses less digits than its factorization.

421945975265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663091.

The product of its digits is 27216000, while the sum is 59.

The spelling of 421945975265 in words is "four hundred twenty-one billion, nine hundred forty-five million, nine hundred seventy-five thousand, two hundred sixty-five".