781342034019 has 8 divisors (see below), whose sum is σ = 1042289525952. Its totient is φ = 520644615720.

The previous prime is 781342033991. The next prime is 781342034029. The reversal of 781342034019 is 910430243187.

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

It is not a de Polignac number, because 781342034019 - 2¹⁶ = 781341968483 is a prime.

It is a super-2 number, since 2×781342034019² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (781342034029) 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, 62511117 + ... + 62523614.

It is an arithmetic number, because the mean of its divisors is an integer number (130286190744).

Almost surely, 2^781342034019 is an apocalyptic number.

781342034019 is a deficient number, since it is larger than the sum of its proper divisors (260947491933).

781342034019 is a wasteful number, since it uses less digits than its factorization.

781342034019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125036817.

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 781342034019 in words is "seven hundred eighty-one billion, three hundred forty-two million, thirty-four thousand, nineteen".