780640344123 has 8 divisors (see below), whose sum is σ = 1068984975888. Its totient is φ = 506361304224.

The previous prime is 780640344079. The next prime is 780640344137. The reversal of 780640344123 is 321443046087.

780640344123 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 780640344123 - 2¹⁸ = 780640081979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (780640344023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3516397836 + ... + 3516398057.

It is an arithmetic number, because the mean of its divisors is an integer number (133623121986).

Almost surely, 2^780640344123 is an apocalyptic number.

780640344123 is a deficient number, since it is larger than the sum of its proper divisors (288344631765).

780640344123 is a wasteful number, since it uses less digits than its factorization.

780640344123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7032795933.

The product of its (nonzero) digits is 387072, while the sum is 42.

The spelling of 780640344123 in words is "seven hundred eighty billion, six hundred forty million, three hundred forty-four thousand, one hundred twenty-three".