1544665451340 has 192 divisors, whose sum is σ = 4780351779840. Its totient is φ = 369559680000.

The previous prime is 1544665451309. The next prime is 1544665451377. The reversal of 1544665451340 is 431545664451.

It is a self number, because there is not a number n which added to its sum of digits gives 1544665451340.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20694006 + ... + 20768514.

It is an arithmetic number, because the mean of its divisors is an integer number (24897665520).

Almost surely, 2^{1544665451340} is an apocalyptic number.

1544665451340 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 1544665451340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2390175889920).

1544665451340 is an abundant number, since it is smaller than the sum of its proper divisors (3235686328500).

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

1544665451340 is a wasteful number, since it uses less digits than its factorization.

1544665451340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74944 (or 74942 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 48.

The spelling of 1544665451340 in words is "one trillion, five hundred forty-four billion, six hundred sixty-five million, four hundred fifty-one thousand, three hundred forty".