25529066501940 has 72 divisors (see below), whose sum is σ = 77438635249248. Its totient is φ = 6807710024640.

The previous prime is 25529066501899. The next prime is 25529066501957. The reversal of 25529066501940 is 4910566092552.

25529066501940 is a `hidden beast` number, since 2 + 5 + 5 + 2 + 90 + 6 + 6 + 501 + 9 + 40 = 666.

It is a congruent number.

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, 40214395 + ... + 40844285.

It is an arithmetic number, because the mean of its divisors is an integer number (1075536600684).

Almost surely, 2^{25529066501940} is an apocalyptic number.

25529066501940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25529066501940 is an abundant number, since it is smaller than the sum of its proper divisors (51909568747308).

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

25529066501940 is a wasteful number, since it uses less digits than its factorization.

25529066501940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855069 (or 855064 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 25529066501940 in words is "twenty-five trillion, five hundred twenty-nine billion, sixty-six million, five hundred one thousand, nine hundred forty".