42997521834 has 12 divisors (see below), whose sum is σ = 93161297346. Its totient is φ = 14332507272.

The previous prime is 42997521803. The next prime is 42997521839. The reversal of 42997521834 is 43812579924.

42997521834 is a `hidden beast` number, since 4 + 29 + 97 + 521 + 8 + 3 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29396131209 + 13601390625 = 171453^2 + 116625^2 .

It is not an unprimeable number, because it can be changed into a prime (42997521839) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1194375589 + ... + 1194375624.

Almost surely, 2^42997521834 is an apocalyptic number.

42997521834 is an abundant number, since it is smaller than the sum of its proper divisors (50163775512).

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

42997521834 is a wasteful number, since it uses less digits than its factorization.

42997521834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388751221 (or 2388751218 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 42997521834 in words is "forty-two billion, nine hundred ninety-seven million, five hundred twenty-one thousand, eight hundred thirty-four".