64453531129 has 27 divisors (see below), whose sum is σ = 71210993679. Its totient is φ = 58310469360.

The previous prime is 64453531081. The next prime is 64453531159. The reversal of 64453531129 is 92113535446.

The square root of 64453531129 is 253877.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9534546025 + 54918985104 = 97645^2 + 234348^2 .

It is not a de Polignac number, because 64453531129 - 2¹⁹ = 64453006841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64453531159) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 194723494 + ... + 194723824.

Almost surely, 2^64453531129 is an apocalyptic number.

64453531129 is the 253877-th square number.

64453531129 is the 126939-th centered octagonal number.

It is an amenable number.

64453531129 is a deficient number, since it is larger than the sum of its proper divisors (6757462550).

64453531129 is an frugal number, since it uses more digits than its factorization.

64453531129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806 (or 403 counting only the distinct ones).

The product of its digits is 388800, while the sum is 43.

The spelling of 64453531129 in words is "sixty-four billion, four hundred fifty-three million, five hundred thirty-one thousand, one hundred twenty-nine".