64711729125 has 48 divisors (see below), whose sum is σ = 116738210160. Its totient is φ = 34487913600.

The previous prime is 64711729073. The next prime is 64711729129. The reversal of 64711729125 is 52192711746.

64711729125 is a `hidden beast` number, since 6 + 471 + 1 + 72 + 91 + 25 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 24626083329 + 40085645796 = 156927^2 + 200214^2 .

It is not a de Polignac number, because 64711729125 - 2¹⁰ = 64711728101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64711729129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1587499 + ... + 1627751.

It is an arithmetic number, because the mean of its divisors is an integer number (2432046045).

Almost surely, 2^64711729125 is an apocalyptic number.

It is an amenable number.

64711729125 is a deficient number, since it is larger than the sum of its proper divisors (52026481035).

64711729125 is a wasteful number, since it uses less digits than its factorization.

64711729125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41703 (or 41690 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The spelling of 64711729125 in words is "sixty-four billion, seven hundred eleven million, seven hundred twenty-nine thousand, one hundred twenty-five".