64610440144 has 20 divisors (see below), whose sum is σ = 128566045924. Its totient is φ = 31432105728.

The previous prime is 64610440099. The next prime is 64610440151. The reversal of 64610440144 is 44104401646.

It can be written as a sum of positive squares in 2 ways, for example, as 61009000000 + 3601440144 = 247000^2 + 60012^2 .

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, 54569037 + ... + 54570220.

Almost surely, 2^64610440144 is an apocalyptic number.

It is an amenable number.

64610440144 is a deficient number, since it is larger than the sum of its proper divisors (63955605780).

64610440144 is a wasteful number, since it uses less digits than its factorization.

64610440144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109139302 (or 109139296 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The spelling of 64610440144 in words is "sixty-four billion, six hundred ten million, four hundred forty thousand, one hundred forty-four".