64505887496 has 16 divisors (see below), whose sum is σ = 120972866640. Its totient is φ = 32246456400.

The previous prime is 64505887451. The next prime is 64505887499. The reversal of 64505887496 is 69478850546.

It is a super-2 number, since 2×64505887496² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (64505887499) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 768530 + ... + 848321.

It is an arithmetic number, because the mean of its divisors is an integer number (7560804165).

Almost surely, 2^64505887496 is an apocalyptic number.

It is an amenable number.

64505887496 is a deficient number, since it is larger than the sum of its proper divisors (56466979144).

64505887496 is a wasteful number, since it uses less digits than its factorization.

64505887496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621844 (or 1621840 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 62.

The spelling of 64505887496 in words is "sixty-four billion, five hundred five million, eight hundred eighty-seven thousand, four hundred ninety-six".