427749274681 has 4 divisors (see below), whose sum is σ = 442499249700. Its totient is φ = 412999299664.

The previous prime is 427749274621. The next prime is 427749274703. The reversal of 427749274681 is 186472947724.

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 339842361600 + 87906913081 = 582960^2 + 296491^2 .

It is a cyclic number.

It is not a de Polignac number, because 427749274681 - 2²³ = 427740886073 is a prime.

It is a super-2 number, since 2×427749274681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427749274621) 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, 7374987466 + ... + 7374987523.

It is an arithmetic number, because the mean of its divisors is an integer number (110624812425).

Almost surely, 2^427749274681 is an apocalyptic number.

It is an amenable number.

427749274681 is a deficient number, since it is larger than the sum of its proper divisors (14749975019).

427749274681 is a wasteful number, since it uses less digits than its factorization.

427749274681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14749975018.

The product of its digits is 37933056, while the sum is 61.

The spelling of 427749274681 in words is "four hundred twenty-seven billion, seven hundred forty-nine million, two hundred seventy-four thousand, six hundred eighty-one".