64465009880 has 64 divisors (see below), whose sum is σ = 145959861600. Its totient is φ = 25623797760.

The previous prime is 64465009879. The next prime is 64465009927. The reversal of 64465009880 is 8890056446.

It is a happy number.

It is a super-2 number, since 2×64465009880² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 15126950 + ... + 15131210.

Almost surely, 2^64465009880 is an apocalyptic number.

It is an amenable number.

64465009880 is an abundant number, since it is smaller than the sum of its proper divisors (81494851720).

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

64465009880 is a wasteful number, since it uses less digits than its factorization.

64465009880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6564 (or 6560 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 64465009880 in words is "sixty-four billion, four hundred sixty-five million, nine thousand, eight hundred eighty".