64641456506 has 32 divisors (see below), whose sum is σ = 112087634112. Its totient is φ = 27632239360.

The previous prime is 64641456469. The next prime is 64641456511. The reversal of 64641456506 is 60565414646.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409925 + ... + 545271.

It is an arithmetic number, because the mean of its divisors is an integer number (3502738566).

Almost surely, 2^64641456506 is an apocalyptic number.

64641456506 is a deficient number, since it is larger than the sum of its proper divisors (47446177606).

64641456506 is a wasteful number, since it uses less digits than its factorization.

64641456506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136654.

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 64641456506 in words is "sixty-four billion, six hundred forty-one million, four hundred fifty-six thousand, five hundred six".