1778787849340 has 24 divisors (see below), whose sum is σ = 3735479536992. Its totient is φ = 711510367680.

The previous prime is 1778787849313. The next prime is 1778787849347. The reversal of 1778787849340 is 439487878771.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1778787849347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5733810 + ... + 6036070.

It is an arithmetic number, because the mean of its divisors is an integer number (155644980708).

Almost surely, 2^{1778787849340} is an apocalyptic number.

1778787849340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1778787849340 is an abundant number, since it is smaller than the sum of its proper divisors (1956691687652).

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

1778787849340 is a wasteful number, since it uses less digits than its factorization.

1778787849340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596517 (or 596515 counting only the distinct ones).

The product of its (nonzero) digits is 531062784, while the sum is 73.

The spelling of 1778787849340 in words is "one trillion, seven hundred seventy-eight billion, seven hundred eighty-seven million, eight hundred forty-nine thousand, three hundred forty".