3521378761 has 2 divisors, whose sum is σ = 3521378762. Its totient is φ = 3521378760.

The previous prime is 3521378719. The next prime is 3521378801. The reversal of 3521378761 is 1678731253.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3038214400 + 483164361 = 55120^2 + 21981^2 .

It is a cyclic number.

It is not a de Polignac number, because 3521378761 - 2⁷ = 3521378633 is a prime.

It is not a weakly prime, because it can be changed into another prime (3521378261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1760689380 + 1760689381.

It is an arithmetic number, because the mean of its divisors is an integer number (1760689381).

Almost surely, 2^3521378761 is an apocalyptic number.

It is an amenable number.

3521378761 is a deficient number, since it is larger than the sum of its proper divisors (1).

3521378761 is an equidigital number, since it uses as much as digits as its factorization.

3521378761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The square root of 3521378761 is about 59341.2062651241. The cubic root of 3521378761 is about 1521.3795705958.

The spelling of 3521378761 in words is "three billion, five hundred twenty-one million, three hundred seventy-eight thousand, seven hundred sixty-one".