420929165540 has 24 divisors (see below), whose sum is σ = 951947498040. Its totient is φ = 155419999488.

The previous prime is 420929165483. The next prime is 420929165543. The reversal of 420929165540 is 45561929024.

It can be written as a sum of positive squares in 4 ways, for example, as 8012398144 + 412916767396 = 89512^2 + 642586^2 .

It is not an unprimeable number, because it can be changed into a prime (420929165543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809478905 + ... + 809479424.

It is an arithmetic number, because the mean of its divisors is an integer number (39664479085).

Almost surely, 2^420929165540 is an apocalyptic number.

It is an amenable number.

420929165540 is an abundant number, since it is smaller than the sum of its proper divisors (531018332500).

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

420929165540 is a wasteful number, since it uses less digits than its factorization.

420929165540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618958351 (or 1618958349 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 420929165540 in words is "four hundred twenty billion, nine hundred twenty-nine million, one hundred sixty-five thousand, five hundred forty".