42434915691 has 16 divisors (see below), whose sum is σ = 64666603008. Its totient is φ = 24247070400.

The previous prime is 42434915641. The next prime is 42434915707. The reversal of 42434915691 is 19651943424.

It is not a de Polignac number, because 42434915691 - 2¹¹ = 42434913643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42434915691.

It is not an unprimeable number, because it can be changed into a prime (42434915641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369271 + ... + 470351.

It is an arithmetic number, because the mean of its divisors is an integer number (4041662688).

Almost surely, 2^42434915691 is an apocalyptic number.

42434915691 is a deficient number, since it is larger than the sum of its proper divisors (22231687317).

42434915691 is a wasteful number, since it uses less digits than its factorization.

42434915691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121082.

The product of its digits is 933120, while the sum is 48.

The spelling of 42434915691 in words is "forty-two billion, four hundred thirty-four million, nine hundred fifteen thousand, six hundred ninety-one".