64455543600 has 120 divisors (see below), whose sum is σ = 235968706560. Its totient is φ = 14732693760.

The previous prime is 64455543587. The next prime is 64455543623. The reversal of 64455543600 is 634555446.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3828240 + ... + 3845039.

It is an arithmetic number, because the mean of its divisors is an integer number (1966405888).

Almost surely, 2^64455543600 is an apocalyptic number.

64455543600 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64455543600 is an abundant number, since it is smaller than the sum of its proper divisors (171513162960).

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

64455543600 is a wasteful number, since it uses less digits than its factorization.

64455543600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7673307 (or 7673296 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 42.

The spelling of 64455543600 in words is "sixty-four billion, four hundred fifty-five million, five hundred forty-three thousand, six hundred".