275504511640 has 128 divisors (see below), whose sum is σ = 640668994560. Its totient is φ = 106568607744.

The previous prime is 275504511619. The next prime is 275504511647. The reversal of 275504511640 is 46115405572.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 275504511593 and 275504511602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275504511647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87100699 + ... + 87103861.

It is an arithmetic number, because the mean of its divisors is an integer number (5005226520).

Almost surely, 2^275504511640 is an apocalyptic number.

275504511640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 275504511640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320334497280).

275504511640 is an abundant number, since it is smaller than the sum of its proper divisors (365164482920).

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

275504511640 is a wasteful number, since it uses less digits than its factorization.

275504511640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3761 (or 3757 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 275504511640 in words is "two hundred seventy-five billion, five hundred four million, five hundred eleven thousand, six hundred forty".