780640344121 has 8 divisors (see below), whose sum is σ = 888634067904. Its totient is φ = 678817690320.

The previous prime is 780640344079. The next prime is 780640344137. The reversal of 780640344121 is 121443046087.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 780640344121 - 2¹¹ = 780640342073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (780640342121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1542767226 + ... + 1542767731.

It is an arithmetic number, because the mean of its divisors is an integer number (111079258488).

Almost surely, 2^780640344121 is an apocalyptic number.

It is an amenable number.

780640344121 is a deficient number, since it is larger than the sum of its proper divisors (107993723783).

780640344121 is a wasteful number, since it uses less digits than its factorization.

780640344121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3085534991.

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 780640344121 in words is "seven hundred eighty billion, six hundred forty million, three hundred forty-four thousand, one hundred twenty-one".