42684276581 has 8 divisors (see below), whose sum is σ = 42771236760. Its totient is φ = 42597388288.

The previous prime is 42684276571. The next prime is 42684276637. The reversal of 42684276581 is 18567248624.

It can be written as a sum of positive squares in 4 ways, for example, as 24470344900 + 18213931681 = 156430^2 + 134959^2 .

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 42684276581 - 2⁶ = 42684276517 is a prime.

It is a super-3 number, since 3×42684276581³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42684276521) 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, 1262165 + ... + 1295541.

It is an arithmetic number, because the mean of its divisors is an integer number (5346404595).

Almost surely, 2^42684276581 is an apocalyptic number.

It is an amenable number.

42684276581 is a deficient number, since it is larger than the sum of its proper divisors (86960179).

42684276581 is a wasteful number, since it uses less digits than its factorization.

42684276581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35943.

The product of its digits is 5160960, while the sum is 53.

The spelling of 42684276581 in words is "forty-two billion, six hundred eighty-four million, two hundred seventy-six thousand, five hundred eighty-one".