64906446550 has 48 divisors (see below), whose sum is σ = 132130418112. Its totient is φ = 23525402400.

The previous prime is 64906446463. The next prime is 64906446551. The reversal of 64906446550 is 5564460946.

It is a junction number, because it is equal to n+sod(n) for n = 64906446494 and 64906446503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64906446551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23352 + ... + 361051.

It is an arithmetic number, because the mean of its divisors is an integer number (2752717044).

Almost surely, 2^64906446550 is an apocalyptic number.

64906446550 is an abundant number, since it is smaller than the sum of its proper divisors (67223971562).

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

64906446550 is a wasteful number, since it uses less digits than its factorization.

64906446550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384733 (or 384728 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 64906446550 in words is "sixty-four billion, nine hundred six million, four hundred forty-six thousand, five hundred fifty".