64455216540 has 144 divisors (see below), whose sum is σ = 213632682144. Its totient is φ = 14423523840.

The previous prime is 64455216509. The next prime is 64455216569. The reversal of 64455216540 is 4561255446.

It is a super-3 number, since 3×64455216540³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64455216492 and 64455216501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 247087 + ... + 435846.

Almost surely, 2^64455216540 is an apocalyptic number.

64455216540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64455216540 is an abundant number, since it is smaller than the sum of its proper divisors (149177465604).

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

64455216540 is a wasteful number, since it uses less digits than its factorization.

64455216540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682980 (or 682967 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 42.

The spelling of 64455216540 in words is "sixty-four billion, four hundred fifty-five million, two hundred sixteen thousand, five hundred forty".