25530305307505 has 24 divisors (see below), whose sum is σ = 31303356552000. Its totient is φ = 19988465808960.

The previous prime is 25530305307491. The next prime is 25530305307547. The reversal of 25530305307505 is 50570350303552.

It is not a de Polignac number, because 25530305307505 - 2¹¹ = 25530305305457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254586 + ... + 7150204.

It is an arithmetic number, because the mean of its divisors is an integer number (1304306523000).

Almost surely, 2^{25530305307505} is an apocalyptic number.

It is an amenable number.

25530305307505 is a deficient number, since it is larger than the sum of its proper divisors (5773051244495).

25530305307505 is an equidigital number, since it uses as much as digits as its factorization.

25530305307505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6895945 (or 6895884 counting only the distinct ones).

The product of its (nonzero) digits is 1181250, while the sum is 43.

The spelling of 25530305307505 in words is "twenty-five trillion, five hundred thirty billion, three hundred five million, three hundred seven thousand, five hundred five".