42940168191 has 24 divisors (see below), whose sum is σ = 62143648320. Its totient is φ = 28571939136.

The previous prime is 42940168189. The next prime is 42940168237. The reversal of 42940168191 is 19186104924.

It is a happy number.

It is not a de Polignac number, because 42940168191 - 2¹ = 42940168189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42940168091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15517290 + ... + 15520056.

It is an arithmetic number, because the mean of its divisors is an integer number (2589318680).

Almost surely, 2^42940168191 is an apocalyptic number.

42940168191 is a deficient number, since it is larger than the sum of its proper divisors (19203480129).

42940168191 is a wasteful number, since it uses less digits than its factorization.

42940168191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5455 (or 5452 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 42940168191 in words is "forty-two billion, nine hundred forty million, one hundred sixty-eight thousand, one hundred ninety-one".