42786818461 has 4 divisors (see below), whose sum is σ = 42913782652. Its totient is φ = 42659854272.

The previous prime is 42786818453. The next prime is 42786818479. The reversal of 42786818461 is 16481868724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3193380100 + 39593438361 = 56510^2 + 198981^2 .

It is a cyclic number.

It is not a de Polignac number, because 42786818461 - 2³ = 42786818453 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 (42786818401) 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, 63481590 + ... + 63482263.

It is an arithmetic number, because the mean of its divisors is an integer number (10728445663).

Almost surely, 2^42786818461 is an apocalyptic number.

It is an amenable number.

42786818461 is a deficient number, since it is larger than the sum of its proper divisors (126964191).

42786818461 is a wasteful number, since it uses less digits than its factorization.

42786818461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126964190.

The product of its digits is 4128768, while the sum is 55.

The spelling of 42786818461 in words is "forty-two billion, seven hundred eighty-six million, eight hundred eighteen thousand, four hundred sixty-one".