129378507419 has 4 divisors (see below), whose sum is σ = 147861151344. Its totient is φ = 110895863496.

The previous prime is 129378507407. The next prime is 129378507437. The reversal of 129378507419 is 914705873921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129378507419 - 2²⁴ = 129361730203 is a prime.

It is a super-2 number, since 2×129378507419² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129378507439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9241321952 + ... + 9241321965.

It is an arithmetic number, because the mean of its divisors is an integer number (36965287836).

Almost surely, 2^129378507419 is an apocalyptic number.

129378507419 is a deficient number, since it is larger than the sum of its proper divisors (18482643925).

129378507419 is an equidigital number, since it uses as much as digits as its factorization.

129378507419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18482643924.

The product of its (nonzero) digits is 3810240, while the sum is 56.

The spelling of 129378507419 in words is "one hundred twenty-nine billion, three hundred seventy-eight million, five hundred seven thousand, four hundred nineteen".