525550778000 has 80 divisors (see below), whose sum is σ = 1280483043840. Its totient is φ = 208615472000.

The previous prime is 525550777967. The next prime is 525550778003. The reversal of 525550778000 is 877055525.

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

It is not an unprimeable number, because it can be changed into a prime (525550778003) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 740960 + ... + 1264959.

It is an arithmetic number, because the mean of its divisors is an integer number (16006038048).

Almost surely, 2^525550778000 is an apocalyptic number.

525550778000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

525550778000 is an abundant number, since it is smaller than the sum of its proper divisors (754932265840).

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

525550778000 is a wasteful number, since it uses less digits than its factorization.

525550778000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006073 (or 2006057 counting only the distinct ones).

The product of its (nonzero) digits is 490000, while the sum is 44.

The spelling of 525550778000 in words is "five hundred twenty-five billion, five hundred fifty million, seven hundred seventy-eight thousand".