1345256640440 has 32 divisors (see below), whose sum is σ = 3072003976080. Its totient is φ = 530071272192.

The previous prime is 1345256640437. The next prime is 1345256640491. The reversal of 1345256640440 is 440466525431.

It is a junction number, because it is equal to n+sod(n) for n = 1345256640391 and 1345256640400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250978037 + ... + 250983396.

Almost surely, 2^{1345256640440} is an apocalyptic number.

1345256640440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1345256640440 is an abundant number, since it is smaller than the sum of its proper divisors (1726747335640).

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

1345256640440 is a wasteful number, since it uses less digits than its factorization.

1345256640440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501961511 (or 501961507 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 44.

The spelling of 1345256640440 in words is "one trillion, three hundred forty-five billion, two hundred fifty-six million, six hundred forty thousand, four hundred forty".