30302545305040 has 80 divisors (see below), whose sum is σ = 71158255736400. Its totient is φ = 11999780249600.

The previous prime is 30302545304989. The next prime is 30302545305041. The reversal of 30302545305040 is 4050354520303.

It can be written as a sum of positive squares in 8 ways, for example, as 1307034281536 + 28995511023504 = 1143256^2 + 5384748^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 30302545304987 and 30302545305005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30302545305041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80912136 + ... + 81285784.

It is an arithmetic number, because the mean of its divisors is an integer number (889478196705).

Almost surely, 2^{30302545305040} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30302545305040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35579127868200).

30302545305040 is an abundant number, since it is smaller than the sum of its proper divisors (40855710431360).

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

30302545305040 is a wasteful number, since it uses less digits than its factorization.

30302545305040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383800 (or 383794 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 34.

Adding to 30302545305040 its reverse (4050354520303), we get a palindrome (34352899825343).

The spelling of 30302545305040 in words is "thirty trillion, three hundred two billion, five hundred forty-five million, three hundred five thousand, forty".