275638390912 has 64 divisors (see below), whose sum is σ = 555023901600. Its totient is φ = 136339513344.

The previous prime is 275638390897. The next prime is 275638390943. The reversal of 275638390912 is 219093836572.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48705139 + ... + 48710797.

Almost surely, 2^275638390912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 275638390912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277511950800).

275638390912 is an abundant number, since it is smaller than the sum of its proper divisors (279385510688).

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

275638390912 is an equidigital number, since it uses as much as digits as its factorization.

275638390912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9693 (or 9681 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 275638390912 in words is "two hundred seventy-five billion, six hundred thirty-eight million, three hundred ninety thousand, nine hundred twelve".