3945649858352 has 40 divisors (see below), whose sum is σ = 7775978496000. Its totient is φ = 1938960447552.

The previous prime is 3945649858321. The next prime is 3945649858391. The reversal of 3945649858352 is 2538589465493.

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, 3853649 + ... + 4768847.

It is an arithmetic number, because the mean of its divisors is an integer number (194399462400).

Almost surely, 2^{3945649858352} is an apocalyptic number.

It is an amenable number.

3945649858352 is a deficient number, since it is larger than the sum of its proper divisors (3830328637648).

3945649858352 is a wasteful number, since it uses less digits than its factorization.

3945649858352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919833 (or 919827 counting only the distinct ones).

The product of its digits is 1119744000, while the sum is 71.

The spelling of 3945649858352 in words is "three trillion, nine hundred forty-five billion, six hundred forty-nine million, eight hundred fifty-eight thousand, three hundred fifty-two".