420291570861 has 12 divisors (see below), whose sum is σ = 607099460188. Its totient is φ = 280189010304.

The previous prime is 420291570827. The next prime is 420291570863. The reversal of 420291570861 is 168075192024.

It can be written as a sum of positive squares in 2 ways, for example, as 151002188100 + 269289382761 = 388590^2 + 518931^2 .

It is not a de Polignac number, because 420291570861 - 2²² = 420287376557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420291570863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80991 + ... + 920403.

Almost surely, 2^420291570861 is an apocalyptic number.

It is an amenable number.

420291570861 is a deficient number, since it is larger than the sum of its proper divisors (186807889327).

420291570861 is a wasteful number, since it uses less digits than its factorization.

420291570861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895052 (or 895049 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 420291570861 in words is "four hundred twenty billion, two hundred ninety-one million, five hundred seventy thousand, eight hundred sixty-one".