1780540055220 has 48 divisors (see below), whose sum is σ = 5017267035648. Its totient is φ = 471786407040.

The previous prime is 1780540055209. The next prime is 1780540055221. The reversal of 1780540055220 is 225500450871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1780540055221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94499076 + ... + 94517915.

It is an arithmetic number, because the mean of its divisors is an integer number (104526396576).

Almost surely, 2^{1780540055220} is an apocalyptic number.

1780540055220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1780540055220 is an abundant number, since it is smaller than the sum of its proper divisors (3236726980428).

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

1780540055220 is a wasteful number, since it uses less digits than its factorization.

1780540055220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189017160 (or 189017158 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 39.

The spelling of 1780540055220 in words is "one trillion, seven hundred eighty billion, five hundred forty million, fifty-five thousand, two hundred twenty".