42291891234 has 40 divisors (see below), whose sum is σ = 94776925980. Its totient is φ = 14095547424.

The previous prime is 42291891199. The next prime is 42291891259. The reversal of 42291891234 is 43219819224.

42291891234 is a `hidden beast` number, since 42 + 291 + 8 + 91 + 234 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 40806020025 + 1485871209 = 202005^2 + 38547^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42291891234.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2423412 + ... + 2440800.

Almost surely, 2^42291891234 is an apocalyptic number.

42291891234 is an abundant number, since it is smaller than the sum of its proper divisors (52485034746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42291891234 is a wasteful number, since it uses less digits than its factorization.

42291891234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32416 (or 32407 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The spelling of 42291891234 in words is "forty-two billion, two hundred ninety-one million, eight hundred ninety-one thousand, two hundred thirty-four".