3921936630544 has 45 divisors (see below), whose sum is σ = 7810258172031. Its totient is φ = 1907826583680.

The previous prime is 3921936630517. The next prime is 3921936630587. The reversal of 3921936630544 is 4450366391293.

The square root of 3921936630544 is 1980388.

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

It can be written as a sum of positive squares in 4 ways, for example, as 2677027600 + 3919259602944 = 51740^2 + 1979712^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 293090734 + ... + 293104114.

Almost surely, 2^{3921936630544} is an apocalyptic number.

3921936630544 is the 1980388-th square number.

It is an amenable number.

3921936630544 is a deficient number, since it is larger than the sum of its proper divisors (3888321541487).

3921936630544 is an frugal number, since it uses more digits than its factorization.

3921936630544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26844 (or 13420 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 55.

The spelling of 3921936630544 in words is "three trillion, nine hundred twenty-one billion, nine hundred thirty-six million, six hundred thirty thousand, five hundred forty-four".