3521578642 has 16 divisors (see below), whose sum is σ = 5414933664. Its totient is φ = 1716660000.

The previous prime is 3521578631. The next prime is 3521578661. The reversal of 3521578642 is 2468751253.

It is a super-2 number, since 2×3521578642² = 24803032263581128328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111517 + ... + 139567.

It is an arithmetic number, because the mean of its divisors is an integer number (338433354).

Almost surely, 2^3521578642 is an apocalyptic number.

3521578642 is a deficient number, since it is larger than the sum of its proper divisors (1893355022).

3521578642 is a wasteful number, since it uses less digits than its factorization.

3521578642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29625.

The product of its digits is 403200, while the sum is 43.

The square root of 3521578642 is about 59342.8904082031. The cubic root of 3521578642 is about 1521.4083556388.

The spelling of 3521578642 in words is "three billion, five hundred twenty-one million, five hundred seventy-eight thousand, six hundred forty-two".