64455780 has 48 divisors (see below), whose sum is σ = 181165824. Its totient is φ = 17122560.

The previous prime is 64455779. The next prime is 64455817. The reversal of 64455780 is 8755446.

64455780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14949 + ... + 18771.

It is an arithmetic number, because the mean of its divisors is an integer number (3774288).

Almost surely, 2^64455780 is an apocalyptic number.

64455780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64455780 is an abundant number, since it is smaller than the sum of its proper divisors (116710044).

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

64455780 is a wasteful number, since it uses less digits than its factorization.

64455780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4116 (or 4114 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 64455780 is about 8028.4357131386. The cubic root of 64455780 is about 400.9472964692.

The spelling of 64455780 in words is "sixty-four million, four hundred fifty-five thousand, seven hundred eighty".