1255005140440 has 64 divisors (see below), whose sum is σ = 2844455040000. Its totient is φ = 498324182400.

The previous prime is 1255005140429. The next prime is 1255005140461. The reversal of 1255005140440 is 440415005521.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82563961 + ... + 82579159.

It is an arithmetic number, because the mean of its divisors is an integer number (44444610000).

Almost surely, 2^{1255005140440} is an apocalyptic number.

1255005140440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255005140440 is an abundant number, since it is smaller than the sum of its proper divisors (1589449899560).

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

1255005140440 is a wasteful number, since it uses less digits than its factorization.

1255005140440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30200 (or 30196 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

The spelling of 1255005140440 in words is "one trillion, two hundred fifty-five billion, five million, one hundred forty thousand, four hundred forty".