3730357521 has 18 divisors (see below), whose sum is σ = 5922672210. Its totient is φ = 2260822080.

The previous prime is 3730357487. The next prime is 3730357601. The reversal of 3730357521 is 1257530373.

3730357521 is a `hidden beast` number, since 37 + 30 + 3 + 575 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3627050625 + 103306896 = 60225^2 + 10164^2 .

It is not a de Polignac number, because 3730357521 - 2⁹ = 3730357009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3730357121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1711656 + ... + 1713833.

It is an arithmetic number, because the mean of its divisors is an integer number (329037345).

Almost surely, 2^3730357521 is an apocalyptic number.

It is an amenable number.

3730357521 is a deficient number, since it is larger than the sum of its proper divisors (2192314689).

3730357521 is a wasteful number, since it uses less digits than its factorization.

3730357521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3425517 (or 3425503 counting only the distinct ones).

The product of its (nonzero) digits is 66150, while the sum is 36.

The square root of 3730357521 is about 61076.6528306848. The cubic root of 3730357521 is about 1550.8988918548.

Adding to 3730357521 its reverse (1257530373), we get a palindrome (4987887894).

The spelling of 3730357521 in words is "three billion, seven hundred thirty million, three hundred fifty-seven thousand, five hundred twenty-one".