64455997428 has 48 divisors (see below), whose sum is σ = 167182296960. Its totient is φ = 21475798272.

The previous prime is 64455997427. The next prime is 64455997457. The reversal of 64455997428 is 82479955446.

64455997428 is a `hidden beast` number, since 6 + 4 + 4 + 559 + 9 + 74 + 2 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64455997427) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 114201 + ... + 376767.

It is an arithmetic number, because the mean of its divisors is an integer number (3482964520).

Almost surely, 2^64455997428 is an apocalyptic number.

It is an amenable number.

64455997428 is an abundant number, since it is smaller than the sum of its proper divisors (102726299532).

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

64455997428 is a wasteful number, since it uses less digits than its factorization.

64455997428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264853 (or 264845 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 63.

The spelling of 64455997428 in words is "sixty-four billion, four hundred fifty-five million, nine hundred ninety-seven thousand, four hundred twenty-eight".