427749346861 has 8 divisors (see below), whose sum is σ = 450269026880. Its totient is φ = 405230322528.

The previous prime is 427749346841. The next prime is 427749346907. The reversal of 427749346861 is 168643947724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 427749346861 - 2³¹ = 425601863213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 427749346861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427749346831) 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, 1745665 + ... + 1975561.

It is an arithmetic number, because the mean of its divisors is an integer number (56283628360).

Almost surely, 2^427749346861 is an apocalyptic number.

It is an amenable number.

427749346861 is a deficient number, since it is larger than the sum of its proper divisors (22519680019).

427749346861 is a wasteful number, since it uses less digits than its factorization.

427749346861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327843.

The product of its digits is 48771072, while the sum is 61.

The spelling of 427749346861 in words is "four hundred twenty-seven billion, seven hundred forty-nine million, three hundred forty-six thousand, eight hundred sixty-one".