129157572085 has 16 divisors (see below), whose sum is σ = 159462681840. Its totient is φ = 100365672960.

The previous prime is 129157572059. The next prime is 129157572121. The reversal of 129157572085 is 580275751921.

It can be written as a sum of positive squares in 8 ways, for example, as 25495466929 + 103662105156 = 159673^2 + 321966^2 .

It is a de Polignac number, because none of the positive numbers 2^k-129157572085 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1328682 + ... + 1422571.

It is an arithmetic number, because the mean of its divisors is an integer number (9966417615).

Almost surely, 2^129157572085 is an apocalyptic number.

It is an amenable number.

129157572085 is a deficient number, since it is larger than the sum of its proper divisors (30305109755).

129157572085 is a wasteful number, since it uses less digits than its factorization.

129157572085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751528.

The product of its (nonzero) digits is 1764000, while the sum is 52.

The spelling of 129157572085 in words is "one hundred twenty-nine billion, one hundred fifty-seven million, five hundred seventy-two thousand, eighty-five".