64400455700 has 144 divisors (see below), whose sum is σ = 169341911424. Its totient is φ = 20752588800.

The previous prime is 64400455697. The next prime is 64400455747. The reversal of 64400455700 is 755400446.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9647564 + ... + 9654236.

It is an arithmetic number, because the mean of its divisors is an integer number (1175985496).

Almost surely, 2^64400455700 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 64400455700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84670955712).

64400455700 is an abundant number, since it is smaller than the sum of its proper divisors (104941455724).

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

64400455700 is a wasteful number, since it uses less digits than its factorization.

64400455700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7522 (or 7515 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 35.

The spelling of 64400455700 in words is "sixty-four billion, four hundred million, four hundred fifty-five thousand, seven hundred".