64451867899392 has 800 divisors, whose sum is σ = 196699703270400. Its totient is φ = 21008162488320.

The previous prime is 64451867899387. The next prime is 64451867899421. The reversal of 64451867899392 is 29399876815446.

It is a happy number.

64451867899392 is a `hidden beast` number, since 6 + 4 + 4 + 518 + 6 + 7 + 8 + 9 + 9 + 3 + 92 = 666.

64451867899392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 168281639233 + ... + 168281639615.

It is an arithmetic number, because the mean of its divisors is an integer number (245874629088).

Almost surely, 2^{64451867899392} 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 64451867899392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98349851635200).

64451867899392 is an abundant number, since it is smaller than the sum of its proper divisors (132247835371008).

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

64451867899392 is a wasteful number, since it uses less digits than its factorization.

64451867899392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916 (or 891 counting only the distinct ones).

The product of its digits is 5643509760, while the sum is 81.

The spelling of 64451867899392 in words is "sixty-four trillion, four hundred fifty-one billion, eight hundred sixty-seven million, eight hundred ninety-nine thousand, three hundred ninety-two".