3917478064644 has 63 divisors (see below), whose sum is σ = 10278958311013. Its totient is φ = 1305790394832.

The previous prime is 3917478064613. The next prime is 3917478064651. The reversal of 3917478064644 is 4464608747193.

The square root of 3917478064644 is 1979262.

It is a perfect power (a square), and thus also a powerful number.

3917478064644 is a `hidden beast` number, since 3 + 91 + 7 + 4 + 7 + 80 + 6 + 464 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1570184424900 + 2347293639744 = 1253070^2 + 1532088^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 106861822 + ... + 106898474.

Almost surely, 2^{3917478064644} is an apocalyptic number.

3917478064644 is the 1979262-nd square number.

It is an amenable number.

3917478064644 is an abundant number, since it is smaller than the sum of its proper divisors (6361480246369).

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

3917478064644 is an frugal number, since it uses more digits than its factorization.

3917478064644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73328 (or 36658 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 63.

The spelling of 3917478064644 in words is "three trillion, nine hundred seventeen billion, four hundred seventy-eight million, sixty-four thousand, six hundred forty-four".