42320720640 has 144 divisors (see below), whose sum is σ = 147449385216. Its totient is φ = 10259558400.

The previous prime is 42320720599. The next prime is 42320720693. The reversal of 42320720640 is 4602702324.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 42320720598 and 42320720607.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 458716 + ... + 543195.

It is an arithmetic number, because the mean of its divisors is an integer number (1023954064).

Almost surely, 2^42320720640 is an apocalyptic number.

42320720640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42320720640 is an abundant number, since it is smaller than the sum of its proper divisors (105128664576).

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

42320720640 is a wasteful number, since it uses less digits than its factorization.

42320720640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001946 (or 1001932 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 30.

The spelling of 42320720640 in words is "forty-two billion, three hundred twenty million, seven hundred twenty thousand, six hundred forty".