417561421645 has 4 divisors (see below), whose sum is σ = 501073705980. Its totient is φ = 334049137312.

The previous prime is 417561421633. The next prime is 417561421657. The reversal of 417561421645 is 546124165714.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546124165714 = 2 ⋅273062082857.

It is an interprime number because it is at equal distance from previous prime (417561421633) and next prime (417561421657).

It can be written as a sum of positive squares in 2 ways, for example, as 295915328361 + 121646093284 = 543981^2 + 348778^2 .

It is a cyclic number.

It is not a de Polignac number, because 417561421645 - 2³⁷ = 280122468173 is a prime.

It is a super-3 number, since 3×417561421645³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 417561421595 and 417561421604.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 41756142160 + ... + 41756142169.

It is an arithmetic number, because the mean of its divisors is an integer number (125268426495).

Almost surely, 2^417561421645 is an apocalyptic number.

It is an amenable number.

417561421645 is a deficient number, since it is larger than the sum of its proper divisors (83512284335).

417561421645 is an equidigital number, since it uses as much as digits as its factorization.

417561421645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83512284334.

The product of its digits is 806400, while the sum is 46.

The spelling of 417561421645 in words is "four hundred seventeen billion, five hundred sixty-one million, four hundred twenty-one thousand, six hundred forty-five".