1525525455640 has 64 divisors (see below), whose sum is σ = 3526149412800. Its totient is φ = 593558235648.

The previous prime is 1525525455557. The next prime is 1525525455667. The reversal of 1525525455640 is 465545255251.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 5438346 + ... + 5711974.

It is an arithmetic number, because the mean of its divisors is an integer number (55096084575).

Almost surely, 2^{1525525455640} is an apocalyptic number.

1525525455640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1525525455640 is an abundant number, since it is smaller than the sum of its proper divisors (2000623957160).

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

1525525455640 is a wasteful number, since it uses less digits than its factorization.

1525525455640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277444 (or 277440 counting only the distinct ones).

The product of its (nonzero) digits is 6000000, while the sum is 49.

The spelling of 1525525455640 in words is "one trillion, five hundred twenty-five billion, five hundred twenty-five million, four hundred fifty-five thousand, six hundred forty".