3521610642 has 128 divisors (see below), whose sum is σ = 8207474688. Its totient is φ = 997574400.

The previous prime is 3521610641. The next prime is 3521610649. The reversal of 3521610642 is 2460161253.

3521610642 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (3521610641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7000963 + ... + 7001465.

It is an arithmetic number, because the mean of its divisors is an integer number (64120896).

Almost surely, 2^3521610642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3521610642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4103737344).

3521610642 is an abundant number, since it is smaller than the sum of its proper divisors (4685864046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3521610642 is a wasteful number, since it uses less digits than its factorization.

3521610642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 3521610642 is about 59343.1600270832. The cubic root of 3521610642 is about 1521.4129638865.

Adding to 3521610642 its reverse (2460161253), we get a palindrome (5981771895).

The spelling of 3521610642 in words is "three billion, five hundred twenty-one million, six hundred ten thousand, six hundred forty-two".