1780545588220 has 48 divisors (see below), whose sum is σ = 4277656954368. Its totient is φ = 609851695680.

The previous prime is 1780545588191. The next prime is 1780545588233. The reversal of 1780545588220 is 228855450871.

It is a congruent number.

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, 6331446 + ... + 6606685.

It is an arithmetic number, because the mean of its divisors is an integer number (89117853216).

Almost surely, 2^{1780545588220} is an apocalyptic number.

1780545588220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1780545588220 is an abundant number, since it is smaller than the sum of its proper divisors (2497111366148).

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

1780545588220 is a wasteful number, since it uses less digits than its factorization.

1780545588220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12939130 (or 12939128 counting only the distinct ones).

The product of its (nonzero) digits is 7168000, while the sum is 55.

It can be divided in two parts, 17805 and 45588220, that added together give a triangular number (45606025 = T₉₅₅₀).

The spelling of 1780545588220 in words is "one trillion, seven hundred eighty billion, five hundred forty-five million, five hundred eighty-eight thousand, two hundred twenty".