42745391808 has 224 divisors, whose sum is σ = 137090749440. Its totient is φ = 11489955840.

The previous prime is 42745391803. The next prime is 42745391809. The reversal of 42745391808 is 80819354724.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is not an unprimeable number, because it can be changed into a prime (42745391803) 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 31 ways as a sum of consecutive naturals, for example, 1874298 + ... + 1896966.

Almost surely, 2^42745391808 is an apocalyptic number.

42745391808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42745391808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68545374720).

42745391808 is an abundant number, since it is smaller than the sum of its proper divisors (94345357632).

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

42745391808 is a wasteful number, since it uses less digits than its factorization.

42745391808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22775 (or 22765 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 42745391808 in words is "forty-two billion, seven hundred forty-five million, three hundred ninety-one thousand, eight hundred eight".