129507064851 has 4 divisors (see below), whose sum is σ = 172676086472. Its totient is φ = 86338043232.

The previous prime is 129507064847. The next prime is 129507064903. The reversal of 129507064851 is 158460705921.

It is a happy number.

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

It is not a de Polignac number, because 129507064851 - 2² = 129507064847 is a prime.

It is a super-2 number, since 2×129507064851² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129507064851.

It is not an unprimeable number, because it can be changed into a prime (129507064801) 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, 21584510806 + ... + 21584510811.

It is an arithmetic number, because the mean of its divisors is an integer number (43169021618).

Almost surely, 2^129507064851 is an apocalyptic number.

129507064851 is a deficient number, since it is larger than the sum of its proper divisors (43169021621).

129507064851 is an equidigital number, since it uses as much as digits as its factorization.

129507064851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43169021620.

The product of its (nonzero) digits is 604800, while the sum is 48.

The spelling of 129507064851 in words is "one hundred twenty-nine billion, five hundred seven million, sixty-four thousand, eight hundred fifty-one".