4392557880649 has 9 divisors (see below), whose sum is σ = 4416078422119. Its totient is φ = 4369161985240.

The previous prime is 4392557880547. The next prime is 4392557880703. The reversal of 4392557880649 is 9460887552934.

The square root of 4392557880649 is 2095843.

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

It can be written as a sum of positive squares in only one way, i.e., 2473967223225 + 1918590657424 = 1572885^2 + 1385132^2 .

It is not a de Polignac number, because 4392557880649 - 2¹¹ = 4392557878601 is a prime.

It is a super-2 number, since 2×4392557880649² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4392557880749) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 400300527 + ... + 400311499.

Almost surely, 2^{4392557880649} is an apocalyptic number.

4392557880649 is the 2095843-rd square number.

4392557880649 is the 1047922-nd centered octagonal number.

It is an amenable number.

4392557880649 is a deficient number, since it is larger than the sum of its proper divisors (23520541470).

4392557880649 is an frugal number, since it uses more digits than its factorization.

4392557880649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22328 (or 11164 counting only the distinct ones).

The product of its (nonzero) digits is 522547200, while the sum is 70.

The spelling of 4392557880649 in words is "four trillion, three hundred ninety-two billion, five hundred fifty-seven million, eight hundred eighty thousand, six hundred forty-nine".