129772051814 has 4 divisors (see below), whose sum is σ = 194658077724. Its totient is φ = 64886025906.

The previous prime is 129772051811. The next prime is 129772051823. The reversal of 129772051814 is 418150277921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 418150277921 = 331 ⋅1263293891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129772051811) 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 as a sum of consecutive naturals, namely, 32443012952 + ... + 32443012955.

It is an arithmetic number, because the mean of its divisors is an integer number (48664519431).

Almost surely, 2^129772051814 is an apocalyptic number.

129772051814 is a deficient number, since it is larger than the sum of its proper divisors (64886025910).

129772051814 is an equidigital number, since it uses as much as digits as its factorization.

129772051814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64886025909.

The product of its (nonzero) digits is 282240, while the sum is 47.

The spelling of 129772051814 in words is "one hundred twenty-nine billion, seven hundred seventy-two million, fifty-one thousand, eight hundred fourteen".