42098010781 has 8 divisors (see below), whose sum is σ = 42282058104. Its totient is φ = 41914279680.

The previous prime is 42098010761. The next prime is 42098010811. The reversal of 42098010781 is 18701089024.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3420495225 + 38677515556 = 58485^2 + 196666^2 .

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 42098010781 - 2¹⁹ = 42097486493 is a prime.

It is a super-2 number, since 2×42098010781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42098010761) 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, 189771 + ... + 346711.

It is an arithmetic number, because the mean of its divisors is an integer number (5285257263).

Almost surely, 2^42098010781 is an apocalyptic number.

It is an amenable number.

42098010781 is a deficient number, since it is larger than the sum of its proper divisors (184047323).

42098010781 is a wasteful number, since it uses less digits than its factorization.

42098010781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158111.

The product of its (nonzero) digits is 32256, while the sum is 40.

The spelling of 42098010781 in words is "forty-two billion, ninety-eight million, ten thousand, seven hundred eighty-one".