64445006420 has 12 divisors (see below), whose sum is σ = 135334513524. Its totient is φ = 25778002560.

The previous prime is 64445006399. The next prime is 64445006443. The reversal of 64445006420 is 2460054446.

It can be written as a sum of positive squares in 2 ways, for example, as 37501097104 + 26943909316 = 193652^2 + 164146^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1611125141 + ... + 1611125180.

It is an arithmetic number, because the mean of its divisors is an integer number (11277876127).

Almost surely, 2^64445006420 is an apocalyptic number.

It is an amenable number.

64445006420 is an abundant number, since it is smaller than the sum of its proper divisors (70889507104).

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

64445006420 is a wasteful number, since it uses less digits than its factorization.

64445006420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222250330 (or 3222250328 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 35.

The spelling of 64445006420 in words is "sixty-four billion, four hundred forty-five million, six thousand, four hundred twenty".