420187698568 has 48 divisors (see below), whose sum is σ = 874913897340. Its totient is φ = 189025351680.

The previous prime is 420187698563. The next prime is 420187698569. The reversal of 420187698568 is 865896781024.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 377047577764 + 43140120804 = 614042^2 + 207702^2 .

It is not an unprimeable number, because it can be changed into a prime (420187698563) 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, 2143621 + ... + 2331412.

Almost surely, 2^420187698568 is an apocalyptic number.

It is an amenable number.

420187698568 is an abundant number, since it is smaller than the sum of its proper divisors (454726198772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420187698568 is a wasteful number, since it uses less digits than its factorization.

420187698568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4475158 (or 4475143 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 64.

The spelling of 420187698568 in words is "four hundred twenty billion, one hundred eighty-seven million, six hundred ninety-eight thousand, five hundred sixty-eight".