3946521572240 has 40 divisors (see below), whose sum is σ = 9881482862328. Its totient is φ = 1457177195520.

The previous prime is 3946521572239. The next prime is 3946521572263. The reversal of 3946521572240 is 422751256493.

It can be written as a sum of positive squares in 4 ways, for example, as 337570296064 + 3608951276176 = 581008^2 + 1899724^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1897365101 + ... + 1897367180.

Almost surely, 2^{3946521572240} is an apocalyptic number.

It is an amenable number.

3946521572240 is an abundant number, since it is smaller than the sum of its proper divisors (5934961290088).

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

3946521572240 is a wasteful number, since it uses less digits than its factorization.

3946521572240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3794732307 (or 3794732301 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 50.

The spelling of 3946521572240 in words is "three trillion, nine hundred forty-six billion, five hundred twenty-one million, five hundred seventy-two thousand, two hundred forty".