42851647181 has 4 divisors (see below), whose sum is σ = 48973311072. Its totient is φ = 36729983292.

The previous prime is 42851647133. The next prime is 42851647187. The reversal of 42851647181 is 18174615824.

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 42851647181 - 2⁶ = 42851647117 is a prime.

It is a super-3 number, since 3×42851647181³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42851647187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3060831935 + ... + 3060831948.

It is an arithmetic number, because the mean of its divisors is an integer number (12243327768).

Almost surely, 2^42851647181 is an apocalyptic number.

It is an amenable number.

42851647181 is a deficient number, since it is larger than the sum of its proper divisors (6121663891).

42851647181 is an equidigital number, since it uses as much as digits as its factorization.

42851647181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6121663890.

The product of its digits is 430080, while the sum is 47.

The spelling of 42851647181 in words is "forty-two billion, eight hundred fifty-one million, six hundred forty-seven thousand, one hundred eighty-one".