42640744542 has 16 divisors (see below), whose sum is σ = 93034351872. Its totient is φ = 12921437720.

The previous prime is 42640744537. The next prime is 42640744571. The reversal of 42640744542 is 24544704624.

42640744542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42640744542² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42640744494 and 42640744503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323035878 + ... + 323036009.

It is an arithmetic number, because the mean of its divisors is an integer number (5814646992).

Almost surely, 2^42640744542 is an apocalyptic number.

42640744542 is an abundant number, since it is smaller than the sum of its proper divisors (50393607330).

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

42640744542 is a wasteful number, since it uses less digits than its factorization.

42640744542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646071903.

The product of its (nonzero) digits is 860160, while the sum is 42.

The spelling of 42640744542 in words is "forty-two billion, six hundred forty million, seven hundred forty-four thousand, five hundred forty-two".