1455781447040 has 128 divisors (see below), whose sum is σ = 3781572480000. Its totient is φ = 533868779520.

The previous prime is 1455781447037. The next prime is 1455781447051. The reversal of 1455781447040 is 407441875541.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1455781447040.

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, 1553990 + ... + 2307909.

It is an arithmetic number, because the mean of its divisors is an integer number (29543535000).

Almost surely, 2^{1455781447040} is an apocalyptic number.

1455781447040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1455781447040 is an abundant number, since it is smaller than the sum of its proper divisors (2325791032960).

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

1455781447040 is a wasteful number, since it uses less digits than its factorization.

1455781447040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3861968 (or 3861956 counting only the distinct ones).

The product of its (nonzero) digits is 2508800, while the sum is 50.

The spelling of 1455781447040 in words is "one trillion, four hundred fifty-five billion, seven hundred eighty-one million, four hundred forty-seven thousand, forty".