64655040 has 56 divisors (see below), whose sum is σ = 205282800. Its totient is φ = 17241088.

The previous prime is 64655039. The next prime is 64655051. The reversal of 64655040 is 4055646.

64655040 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 (30).

It is a junction number, because it is equal to n+sod(n) for n = 64654989 and 64655007.

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 7 ways as a sum of consecutive naturals, for example, 32715 + ... + 34634.

Almost surely, 2^64655040 is an apocalyptic number.

64655040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64655040 is an abundant number, since it is smaller than the sum of its proper divisors (140627760).

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

64655040 is a wasteful number, since it uses less digits than its factorization.

64655040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67369 (or 67359 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 64655040 is about 8040.8357774550. The cubic root of 64655040 is about 401.3600371729.

The spelling of 64655040 in words is "sixty-four million, six hundred fifty-five thousand, forty".