3521161040 has 160 divisors (see below), whose sum is σ = 9143414784. Its totient is φ = 1254850560.

The previous prime is 3521161019. The next prime is 3521161109. The reversal of 3521161040 is 401611253.

It is a super-2 number, since 2×3521161040² = 24797150139227763200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3521160997 and 3521161015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1980632 + ... + 1982408.

Almost surely, 2^3521161040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3521161040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4571707392).

3521161040 is an abundant number, since it is smaller than the sum of its proper divisors (5622253744).

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

3521161040 is a wasteful number, since it uses less digits than its factorization.

3521161040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885 (or 1879 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 3521161040 is about 59339.3717526568. The cubic root of 3521161040 is about 1521.3482151590.

Adding to 3521161040 its reverse (401611253), we get a palindrome (3922772293).

The spelling of 3521161040 in words is "three billion, five hundred twenty-one million, one hundred sixty-one thousand, forty".