42081005961 has 12 divisors (see below), whose sum is σ = 60787503088. Its totient is φ = 28052237304.

The previous prime is 42081005909. The next prime is 42081005983. The reversal of 42081005961 is 16950018024.

It is not a de Polignac number, because 42081005961 - 2¹⁰ = 42081004937 is a prime.

It is a super-2 number, since 2×42081005961² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42081005861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12786 + ... + 290388.

Almost surely, 2^42081005961 is an apocalyptic number.

It is an amenable number.

42081005961 is a deficient number, since it is larger than the sum of its proper divisors (18706497127).

42081005961 is a wasteful number, since it uses less digits than its factorization.

42081005961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294452 (or 294449 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 42081005961 in words is "forty-two billion, eighty-one million, five thousand, nine hundred sixty-one".