129376222643 has 4 divisors (see below), whose sum is σ = 130363827528. Its totient is φ = 128388617760.

The previous prime is 129376222639. The next prime is 129376222687. The reversal of 129376222643 is 346222673921.

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 129376222643 - 2² = 129376222639 is a prime.

It is a super-2 number, since 2×129376222643² (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 (129376222603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493802246 + ... + 493802507.

It is an arithmetic number, because the mean of its divisors is an integer number (32590956882).

Almost surely, 2^129376222643 is an apocalyptic number.

129376222643 is a deficient number, since it is larger than the sum of its proper divisors (987604885).

129376222643 is an equidigital number, since it uses as much as digits as its factorization.

129376222643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987604884.

The product of its digits is 1306368, while the sum is 47.

The spelling of 129376222643 in words is "one hundred twenty-nine billion, three hundred seventy-six million, two hundred twenty-two thousand, six hundred forty-three".