25405330545 has 48 divisors (see below), whose sum is σ = 50518271232. Its totient is φ = 11569668480.

The previous prime is 25405330529. The next prime is 25405330567. The reversal of 25405330545 is 54503350452.

25405330545 is a `hidden beast` number, since 25 + 40 + 53 + 3 + 0 + 545 = 666.

It is not a de Polignac number, because 25405330545 - 2⁴ = 25405330529 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70486 + ... + 236175.

It is an arithmetic number, because the mean of its divisors is an integer number (1052463984).

Almost surely, 2^25405330545 is an apocalyptic number.

It is an amenable number.

25405330545 is a deficient number, since it is larger than the sum of its proper divisors (25112940687).

25405330545 is a wasteful number, since it uses less digits than its factorization.

25405330545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306942 (or 306939 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 36.

Adding to 25405330545 its reverse (54503350452), we get a palindrome (79908680997).

The spelling of 25405330545 in words is "twenty-five billion, four hundred five million, three hundred thirty thousand, five hundred forty-five".