1780306776040 has 128 divisors (see below), whose sum is σ = 4470312913920. Its totient is φ = 633662668800.

The previous prime is 1780306776023. The next prime is 1780306776043. The reversal of 1780306776040 is 406776030871.

It is not an unprimeable number, because it can be changed into a prime (1780306776043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3927975 + ... + 4357705.

It is an arithmetic number, because the mean of its divisors is an integer number (34924319640).

Almost surely, 2^{1780306776040} is an apocalyptic number.

1780306776040 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 1780306776040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2235156456960).

1780306776040 is an abundant number, since it is smaller than the sum of its proper divisors (2690006137880).

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

1780306776040 is a wasteful number, since it uses less digits than its factorization.

1780306776040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430043 (or 430039 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 49.

The spelling of 1780306776040 in words is "one trillion, seven hundred eighty billion, three hundred six million, seven hundred seventy-six thousand, forty".