129723326845 has 64 divisors (see below), whose sum is σ = 183297945600. Its totient is φ = 86302218240.

The previous prime is 129723326839. The next prime is 129723326869. The reversal of 129723326845 is 548623327921.

It is a happy number.

It is not a de Polignac number, because 129723326845 - 2⁷ = 129723326717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129723326792 and 129723326801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 98349096 + ... + 98350414.

It is an arithmetic number, because the mean of its divisors is an integer number (2864030400).

Almost surely, 2^129723326845 is an apocalyptic number.

It is an amenable number.

129723326845 is a deficient number, since it is larger than the sum of its proper divisors (53574618755).

129723326845 is a wasteful number, since it uses less digits than its factorization.

129723326845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978.

The product of its digits is 4354560, while the sum is 52.

The spelling of 129723326845 in words is "one hundred twenty-nine billion, seven hundred twenty-three million, three hundred twenty-six thousand, eight hundred forty-five".