1001506565550 has 48 divisors (see below), whose sum is σ = 2483807244912. Its totient is φ = 267060787200.

The previous prime is 1001506565519. The next prime is 1001506565569. The reversal of 1001506565550 is 555656051001.

It is a junction number, because it is equal to n+sod(n) for n = 1001506565499 and 1001506565508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6854862 + ... + 6999438.

It is an arithmetic number, because the mean of its divisors is an integer number (51745984269).

Almost surely, 2^{1001506565550} is an apocalyptic number.

1001506565550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1001506565550 is an abundant number, since it is smaller than the sum of its proper divisors (1482300679362).

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

1001506565550 is a wasteful number, since it uses less digits than its factorization.

1001506565550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190773 (or 190768 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 39.

The spelling of 1001506565550 in words is "one trillion, one billion, five hundred six million, five hundred sixty-five thousand, five hundred fifty".