3537975581 has 4 divisors (see below), whose sum is σ = 4043400672. Its totient is φ = 3032550492.

The previous prime is 3537975577. The next prime is 3537975607. The reversal of 3537975581 is 1855797353.

3537975581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1855797353 = 167 ⋅11112559.

It is a cyclic number.

It is not a de Polignac number, because 3537975581 - 2² = 3537975577 is a prime.

It is a super-2 number, since 2×3537975581² = 25034542423504575122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3537975521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252712535 + ... + 252712548.

It is an arithmetic number, because the mean of its divisors is an integer number (1010850168).

Almost surely, 2^3537975581 is an apocalyptic number.

It is an amenable number.

3537975581 is a deficient number, since it is larger than the sum of its proper divisors (505425091).

3537975581 is an equidigital number, since it uses as much as digits as its factorization.

3537975581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505425090.

The product of its digits is 3969000, while the sum is 53.

The square root of 3537975581 is about 59480.8841645785. The cubic root of 3537975581 is about 1523.7659935426.

The spelling of 3537975581 in words is "three billion, five hundred thirty-seven million, nine hundred seventy-five thousand, five hundred eighty-one".