421641740529 has 12 divisors (see below), whose sum is σ = 625498558516. Its totient is φ = 273497344992.

The previous prime is 421641740519. The next prime is 421641740543. The reversal of 421641740529 is 925047146124.

421641740529 is a `hidden beast` number, since 4 + 2 + 16 + 41 + 74 + 0 + 529 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 327161120400 + 94480620129 = 571980^2 + 307377^2 .

It is not a de Polignac number, because 421641740529 - 2⁹ = 421641740017 is a prime.

It is a super-2 number, since 2×421641740529² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (421641740519) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 633095374 + ... + 633096039.

Almost surely, 2^421641740529 is an apocalyptic number.

It is an amenable number.

421641740529 is a deficient number, since it is larger than the sum of its proper divisors (203856817987).

421641740529 is a wasteful number, since it uses less digits than its factorization.

421641740529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266191456 (or 1266191453 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 421641740529 in words is "four hundred twenty-one billion, six hundred forty-one million, seven hundred forty thousand, five hundred twenty-nine".