42847421165640 has 768 divisors, whose sum is σ = 173671515763200. Its totient is φ = 8920684265472.

The previous prime is 42847421165609. The next prime is 42847421165663. The reversal of 42847421165640 is 4656112474824.

42847421165640 is a `hidden beast` number, since 4 + 2 + 8 + 4 + 74 + 2 + 1 + 1 + 6 + 564 + 0 = 666.

It is an unprimeable number.

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 191 ways as a sum of consecutive naturals, for example, 840301266 + ... + 840352254.

It is an arithmetic number, because the mean of its divisors is an integer number (226134786150).

Almost surely, 2^{42847421165640} is an apocalyptic number.

42847421165640 is a gapful number since it is divisible by the number (40) 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 42847421165640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86835757881600).

42847421165640 is an abundant number, since it is smaller than the sum of its proper divisors (130824094597560).

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

42847421165640 is a wasteful number, since it uses less digits than its factorization.

42847421165640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51366 (or 51359 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 54.

The spelling of 42847421165640 in words is "forty-two trillion, eight hundred forty-seven billion, four hundred twenty-one million, one hundred sixty-five thousand, six hundred forty".