275273507640 has 256 divisors, whose sum is σ = 857344435200. Its totient is φ = 70659477504.

The previous prime is 275273507611. The next prime is 275273507653. The reversal of 275273507640 is 46705372572.

It is a self number, because there is not a number n which added to its sum of digits gives 275273507640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 171295717 + ... + 171297323.

It is an arithmetic number, because the mean of its divisors is an integer number (3349001700).

Almost surely, 2^275273507640 is an apocalyptic number.

275273507640 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 275273507640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (428672217600).

275273507640 is an abundant number, since it is smaller than the sum of its proper divisors (582070927560).

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

275273507640 is a wasteful number, since it uses less digits than its factorization.

275273507640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126 (or 2122 counting only the distinct ones).

The product of its (nonzero) digits is 2469600, while the sum is 48.

The spelling of 275273507640 in words is "two hundred seventy-five billion, two hundred seventy-three million, five hundred seven thousand, six hundred forty".