3988260625969 has 9 divisors (see below), whose sum is σ = 4037058674859. Its totient is φ = 3940045533960.

The previous prime is 3988260625967. The next prime is 3988260625991. The reversal of 3988260625969 is 9695260628893.

The square root of 3988260625969 is 1997063.

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., 3964427441569 + 23833184400 = 1991087^2 + 154380^2 .

It is not a de Polignac number, because 3988260625969 - 2¹ = 3988260625967 is a prime.

It is a super-2 number, since 2×3988260625969² (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 (3988260625967) 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, 165744199 + ... + 165768259.

Almost surely, 2^{3988260625969} is an apocalyptic number.

3988260625969 is the 1997063-rd square number.

3988260625969 is the 998532-nd centered octagonal number.

It is an amenable number.

3988260625969 is a deficient number, since it is larger than the sum of its proper divisors (48798048890).

3988260625969 is an frugal number, since it uses more digits than its factorization.

3988260625969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48288 (or 24144 counting only the distinct ones).

The product of its (nonzero) digits is 604661760, while the sum is 73.

The spelling of 3988260625969 in words is "three trillion, nine hundred eighty-eight billion, two hundred sixty million, six hundred twenty-five thousand, nine hundred sixty-nine".