42054605640 has 48 divisors (see below), whose sum is σ = 136677469500. Its totient is φ = 11214561408.

The previous prime is 42054605639. The next prime is 42054605641. The reversal of 42054605640 is 4650645024.

42054605640 is a `hidden beast` number, since 4 + 2 + 0 + 5 + 4 + 6 + 0 + 5 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (42054605639) and next prime (42054605641).

It can be written as a sum of positive squares in 2 ways, for example, as 40732119684 + 1322485956 = 201822^2 + 36366^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 42054605595 and 42054605604.

It is not an unprimeable number, because it can be changed into a prime (42054605641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58408815 + ... + 58409534.

Almost surely, 2^42054605640 is an apocalyptic number.

42054605640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42054605640 is an abundant number, since it is smaller than the sum of its proper divisors (94622863860).

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

42054605640 is a wasteful number, since it uses less digits than its factorization.

42054605640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116818366 (or 116818359 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The spelling of 42054605640 in words is "forty-two billion, fifty-four million, six hundred five thousand, six hundred forty".