275440642440 has 64 divisors (see below), whose sum is σ = 829868457600. Its totient is φ = 73135590912.

The previous prime is 275440642381. The next prime is 275440642457. The reversal of 275440642440 is 44246044572.

It is a junction number, because it is equal to n+sod(n) for n = 275440642392 and 275440642401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4897660 + ... + 4953579.

It is an arithmetic number, because the mean of its divisors is an integer number (12966694650).

Almost surely, 2^275440642440 is an apocalyptic number.

275440642440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

275440642440 is an abundant number, since it is smaller than the sum of its proper divisors (554427815160).

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

275440642440 is a wasteful number, since it uses less digits than its factorization.

275440642440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9851486 (or 9851482 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 42.

The spelling of 275440642440 in words is "two hundred seventy-five billion, four hundred forty million, six hundred forty-two thousand, four hundred forty".