1455144503440 has 80 divisors (see below), whose sum is σ = 3444085992960. Its totient is φ = 571604940800.

The previous prime is 1455144503431. The next prime is 1455144503557. The reversal of 1455144503440 is 443054415541.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1455144503393 and 1455144503402.

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, 4453665 + ... + 4769215.

It is an arithmetic number, because the mean of its divisors is an integer number (43051074912).

Almost surely, 2^{1455144503440} is an apocalyptic number.

1455144503440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1455144503440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1722042996480).

1455144503440 is an abundant number, since it is smaller than the sum of its proper divisors (1988941489520).

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

1455144503440 is a wasteful number, since it uses less digits than its factorization.

1455144503440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316600 (or 316594 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 40.

Adding to 1455144503440 its reverse (443054415541), we get a palindrome (1898198918981).

The spelling of 1455144503440 in words is "one trillion, four hundred fifty-five billion, one hundred forty-four million, five hundred three thousand, four hundred forty".