42170000491 has 16 divisors (see below), whose sum is σ = 44496377856. Its totient is φ = 39916548576.

The previous prime is 42170000479. The next prime is 42170000549. The reversal of 42170000491 is 19400007124.

42170000491 is a nontrivial binomial coefficient, being equal to C(290414, 2).

It is a cyclic number.

It is not a de Polignac number, because 42170000491 - 2⁵ = 42170000459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42170000401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217810 + ... + 363016.

It is an arithmetic number, because the mean of its divisors is an integer number (2781023616).

Almost surely, 2^42170000491 is an apocalyptic number.

42170000491 is the 290413-rd triangular number and also the 145207-th hexagonal number.

42170000491 is the 96805-th centered nonagonal number.

42170000491 is a deficient number, since it is larger than the sum of its proper divisors (2326377365).

42170000491 is a wasteful number, since it uses less digits than its factorization.

42170000491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145458.

The product of its (nonzero) digits is 2016, while the sum is 28.

The spelling of 42170000491 in words is "forty-two billion, one hundred seventy million, four hundred ninety-one", and thus it is an aban number.