28061450025 has 48 divisors (see below), whose sum is σ = 53749190784. Its totient is φ = 12652346880.

The previous prime is 28061449991. The next prime is 28061450057. The reversal of 28061450025 is 52005416082.

It is a de Polignac number, because none of the positive numbers 2^k-28061450025 is a prime.

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 47 ways as a sum of consecutive naturals, for example, 327774 + ... + 404423.

It is an arithmetic number, because the mean of its divisors is an integer number (1119774808).

Almost surely, 2^28061450025 is an apocalyptic number.

28061450025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28061450025 is a deficient number, since it is larger than the sum of its proper divisors (25687740759).

28061450025 is a wasteful number, since it uses less digits than its factorization.

28061450025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732290 (or 732285 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The spelling of 28061450025 in words is "twenty-eight billion, sixty-one million, four hundred fifty thousand, twenty-five".