42828454681 has 4 divisors (see below), whose sum is σ = 43136573200. Its totient is φ = 42520336164.

The previous prime is 42828454673. The next prime is 42828454687. The reversal of 42828454681 is 18645482824.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42828454681 - 2³ = 42828454673 is a prime.

It is a super-2 number, since 2×42828454681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42828454687) 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, 154059051 + ... + 154059328.

It is an arithmetic number, because the mean of its divisors is an integer number (10784143300).

Almost surely, 2^42828454681 is an apocalyptic number.

It is an amenable number.

42828454681 is a deficient number, since it is larger than the sum of its proper divisors (308118519).

42828454681 is a wasteful number, since it uses less digits than its factorization.

42828454681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308118518.

The product of its digits is 3932160, while the sum is 52.

The spelling of 42828454681 in words is "forty-two billion, eight hundred twenty-eight million, four hundred fifty-four thousand, six hundred eighty-one".