427956705857 has 8 divisors (see below), whose sum is σ = 432781281000. Its totient is φ = 423132488064.

The previous prime is 427956705821. The next prime is 427956705871. The reversal of 427956705857 is 758507659724.

It is a Cunningham number, because it is equal to 654184²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 427956705856 = 1^2 + 654184^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 427956705857 - 2²⁶ = 427889596993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 427956705793 and 427956705802.

It is not an unprimeable number, because it can be changed into a prime (427956705457) 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, 2867519 + ... + 3013067.

It is an arithmetic number, because the mean of its divisors is an integer number (54097660125).

Almost surely, 2^427956705857 is an apocalyptic number.

It is an amenable number.

427956705857 is a deficient number, since it is larger than the sum of its proper divisors (4824575143).

427956705857 is a wasteful number, since it uses less digits than its factorization.

427956705857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178675.

The product of its (nonzero) digits is 148176000, while the sum is 65.

The spelling of 427956705857 in words is "four hundred twenty-seven billion, nine hundred fifty-six million, seven hundred five thousand, eight hundred fifty-seven".