1780727620540 has 48 divisors (see below), whose sum is σ = 4119876087264. Its totient is φ = 641126048000.

The previous prime is 1780727620471. The next prime is 1780727620583. The reversal of 1780727620540 is 450267270871.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40048159 + ... + 40092598.

It is an arithmetic number, because the mean of its divisors is an integer number (85830751818).

Almost surely, 2^{1780727620540} is an apocalyptic number.

1780727620540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1780727620540 is an abundant number, since it is smaller than the sum of its proper divisors (2339148466724).

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

1780727620540 is a wasteful number, since it uses less digits than its factorization.

1780727620540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80140878 (or 80140876 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 1780727620540 in words is "one trillion, seven hundred eighty billion, seven hundred twenty-seven million, six hundred twenty thousand, five hundred forty".