427565403820 has 12 divisors (see below), whose sum is σ = 897887348064. Its totient is φ = 171026161520.

The previous prime is 427565403791. The next prime is 427565403823. The reversal of 427565403820 is 28304565724.

It is not an unprimeable number, because it can be changed into a prime (427565403823) 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 3 ways as a sum of consecutive naturals, for example, 10689135076 + ... + 10689135115.

It is an arithmetic number, because the mean of its divisors is an integer number (74823945672).

Almost surely, 2^427565403820 is an apocalyptic number.

It is an amenable number.

427565403820 is an abundant number, since it is smaller than the sum of its proper divisors (470321944244).

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

427565403820 is a wasteful number, since it uses less digits than its factorization.

427565403820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21378270200 (or 21378270198 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 46.

The spelling of 427565403820 in words is "four hundred twenty-seven billion, five hundred sixty-five million, four hundred three thousand, eight hundred twenty".