3961569481 has 9 divisors (see below), whose sum is σ = 4004126581. Its totient is φ = 3919461952.

The previous prime is 3961569461. The next prime is 3961569503. The reversal of 3961569481 is 1849651693.

The square root of 3961569481 is 62941.

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 3261437881 + 700131600 = 57109^2 + 26460^2 .

It is not a de Polignac number, because 3961569481 - 2⁹ = 3961568969 is a prime.

It is a super-2 number, since 2×3961569481² = 31388065505581218722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3961569401) 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, 7112055 + ... + 7112611.

Almost surely, 2^3961569481 is an apocalyptic number.

3961569481 is the 62941-st square number.

3961569481 is the 31471-st centered octagonal number.

It is an amenable number.

3961569481 is a deficient number, since it is larger than the sum of its proper divisors (42557100).

3961569481 is an frugal number, since it uses more digits than its factorization.

3961569481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340 (or 670 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 52.

The cubic root of 3961569481 is about 1582.3009631486.

The spelling of 3961569481 in words is "three billion, nine hundred sixty-one million, five hundred sixty-nine thousand, four hundred eighty-one".