1780347444480 has 1440 divisors, whose sum is σ = 7152063988608. Its totient is φ = 419232153600.

The previous prime is 1780347444401. The next prime is 1780347444487. The reversal of 1780347444480 is 844447430871.

1780347444480 is a `hidden beast` number, since 1 + 7 + 80 + 3 + 47 + 4 + 44 + 480 = 666.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1780347444487) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 10922376879 + ... + 10922377041.

Almost surely, 2^{1780347444480} is an apocalyptic number.

1780347444480 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 1780347444480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3576031994304).

1780347444480 is an abundant number, since it is smaller than the sum of its proper divisors (5371716544128).

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

1780347444480 is a wasteful number, since it uses less digits than its factorization.

1780347444480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 9633792, while the sum is 54.

The spelling of 1780347444480 in words is "one trillion, seven hundred eighty billion, three hundred forty-seven million, four hundred forty-four thousand, four hundred eighty".