64453257792 has 882 divisors, whose sum is σ = 246244328694. Its totient is φ = 16669255680.

The previous prime is 64453257769. The next prime is 64453257821. The reversal of 64453257792 is 29775235446.

64453257792 is a `hidden beast` number, since 64 + 4 + 5 + 3 + 2 + 577 + 9 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 46749358656 + 17703899136 = 216216^2 + 133056^2 .

It is a tau number, because it is divible by the number of its divisors (882).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 125 ways as a sum of consecutive naturals, for example, 276623308 + ... + 276623540.

Almost surely, 2^64453257792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64453257792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123122164347).

64453257792 is an abundant number, since it is smaller than the sum of its proper divisors (181791070902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64453257792 is a wasteful number, since it uses less digits than its factorization.

64453257792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299 (or 256 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 54.

The spelling of 64453257792 in words is "sixty-four billion, four hundred fifty-three million, two hundred fifty-seven thousand, seven hundred ninety-two".