275618336640 has 128 divisors (see below), whose sum is σ = 879406912800. Its totient is φ = 73425149952.

The previous prime is 275618336563. The next prime is 275618336657. The reversal of 275618336640 is 46633816572.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1874106 + ... + 2015814.

Almost surely, 2^275618336640 is an apocalyptic number.

275618336640 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 275618336640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (439703456400).

275618336640 is an abundant number, since it is smaller than the sum of its proper divisors (603788576160).

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

275618336640 is a wasteful number, since it uses less digits than its factorization.

275618336640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142744 (or 142732 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 275618336640 in words is "two hundred seventy-five billion, six hundred eighteen million, three hundred thirty-six thousand, six hundred forty".