42919181523 has 24 divisors (see below), whose sum is σ = 63709140768. Its totient is φ = 27822310272.

The previous prime is 42919181509. The next prime is 42919181527. The reversal of 42919181523 is 32518191924.

42919181523 is a `hidden beast` number, since 42 + 9 + 1 + 9 + 1 + 81 + 523 = 666.

It is not a de Polignac number, because 42919181523 - 2⁸ = 42919181267 is a prime.

It is a super-2 number, since 2×42919181523² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42919181527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 512890 + ... + 590672.

It is an arithmetic number, because the mean of its divisors is an integer number (2654547532).

Almost surely, 2^42919181523 is an apocalyptic number.

42919181523 is a deficient number, since it is larger than the sum of its proper divisors (20789959245).

42919181523 is a wasteful number, since it uses less digits than its factorization.

42919181523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79483 (or 79480 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The spelling of 42919181523 in words is "forty-two billion, nine hundred nineteen million, one hundred eighty-one thousand, five hundred twenty-three".