3534656521 has 4 divisors (see below), whose sum is σ = 3855988944. Its totient is φ = 3213324100.

The previous prime is 3534656513. The next prime is 3534656551. The reversal of 3534656521 is 1256564353.

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: 1256564353 = 11 ⋅114233123.

It is a cyclic number.

It is not a de Polignac number, because 3534656521 - 2³ = 3534656513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3534656551) 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, 160666195 + ... + 160666216.

It is an arithmetic number, because the mean of its divisors is an integer number (963997236).

Almost surely, 2^3534656521 is an apocalyptic number.

It is an amenable number.

3534656521 is a deficient number, since it is larger than the sum of its proper divisors (321332423).

3534656521 is a wasteful number, since it uses less digits than its factorization.

3534656521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321332422.

The product of its digits is 324000, while the sum is 40.

The square root of 3534656521 is about 59452.9773939035. The cubic root of 3534656521 is about 1523.2893506170.

The spelling of 3534656521 in words is "three billion, five hundred thirty-four million, six hundred fifty-six thousand, five hundred twenty-one".