42909981466 has 24 divisors (see below), whose sum is σ = 70758907380. Its totient is φ = 19501606080.

The previous prime is 42909981461. The next prime is 42909981467. The reversal of 42909981466 is 66418990924.

It can be written as a sum of positive squares in 2 ways, for example, as 41032579225 + 1877402241 = 202565^2 + 43329^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42909981466.

It is not an unprimeable number, because it can be changed into a prime (42909981461) 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, 3112260 + ... + 3126016.

Almost surely, 2^42909981466 is an apocalyptic number.

42909981466 is a deficient number, since it is larger than the sum of its proper divisors (27848925914).

42909981466 is a wasteful number, since it uses less digits than its factorization.

42909981466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26670 (or 26659 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 42909981466 in words is "forty-two billion, nine hundred nine million, nine hundred eighty-one thousand, four hundred sixty-six".