420731455869 has 6 divisors (see below), whose sum is σ = 607723214046. Its totient is φ = 280487637240.

The previous prime is 420731455861. The next prime is 420731455871. The reversal of 420731455869 is 968554137024.

It is a happy number.

420731455869 is a `hidden beast` number, since 4 + 2 + 0 + 73 + 14 + 558 + 6 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 345991004100 + 74740451769 = 588210^2 + 273387^2 .

It is not a de Polignac number, because 420731455869 - 2³ = 420731455861 is a prime.

It is a super-3 number, since 3×420731455869³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420731455861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23373969762 + ... + 23373969779.

It is an arithmetic number, because the mean of its divisors is an integer number (101287202341).

It is a 1-persistent number, because it is pandigital, but 2⋅420731455869 = 841462911738 is not.

Almost surely, 2^420731455869 is an apocalyptic number.

It is an amenable number.

420731455869 is a deficient number, since it is larger than the sum of its proper divisors (186991758177).

420731455869 is a wasteful number, since it uses less digits than its factorization.

420731455869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46747939547 (or 46747939544 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 420731455869 in words is "four hundred twenty billion, seven hundred thirty-one million, four hundred fifty-five thousand, eight hundred sixty-nine".